JP7052056B2 - Data transmission method and equipment - Google Patents

Description

This application relates to the field of wireless communication technology, including the field of vehicle internet technology, and in particular to data transmission methods and devices.

Based on in-vehicle networks, inter-vehicle networks, and in-vehicle mobile internet, the vehicle's internet system implements vehicle-to-X (Vehicle to X, V2X) wireless communication and information exchange in accordance with agreed communication protocols and data exchange standards. .. V2X includes Vehicle to Vehicle (V2V), Vehicle to Network (V2N), Vehicle-to-Infrastructure (V2I), Vehicle-to-Pedestrian, V2P), or similar. In other words, X can be a vehicle, part of the infrastructure, a network, a pedestrian, or the like. Vehicle internet systems aim to improve traffic safety and efficiency while providing users with a wide range of streaming media services via V2X communications.

Cellular technology has advantages such as short delay, high speed, and wide coverage, so it is currently mainstream to use cellular technology to perform V2X communication on the vehicle internet. As shown in FIG. 1, cellular technology can be used for V2X communication over sidelinks (also known as Sidelink and the like). Specifically, resources scheduled or set by the network appliance, or preset resources can be used for direct vehicle-to-vehicle-to-X communication on the sidelink, and data needs to be transferred by the network device. There is no.

When the side link is used for V2X communication, the channel characteristics of the side link change rapidly and there is no corresponding feedback mechanism, so that the communication reliability of the side link is relatively low. When the side link is used for V2X communication, how to ensure the reliability of data transmission on the side link is an urgent issue to be solved.

This application provides data transmission methods and devices for improving the reliability of data transmission over sidelinks. This application scenario includes, but is not limited to, V2X scenarios and can be applied to all scenarios in which communication is performed based on sidelinks, such as device-to-device application scenarios and machine-to-machine application scenarios. .. Specifically, this application discloses the following technical solutions:

According to the first aspect, the application provides a method of transmitting data, wherein the terminal obtains the information used to point to the first condition, obtains the data to be transmitted, and then obtains the data to be transmitted. When the first condition is satisfied, the terminal transmits the transmission target data on the first logical channel by using the first carrier frequency on the side link, and uses the second carrier frequency. This includes transmitting the data to be transmitted on the second logical channel.

Referring to the first aspect, in one implementation of the first aspect, the method further determines a first carrier frequency set and a second carrier frequency set by the terminal, where the first carrier frequency is: The carrier frequency within the first carrier frequency set, the second carrier frequency is the carrier frequency within the second carrier frequency set, and corresponds between the first carrier frequency set and the first logical channel. It includes the existence of a relationship and the existence of a correspondence between the second carrier frequency set and the second logical channel.

With reference to the first aspect, in another implementation of the first aspect, determining a first carrier frequency set and a second carrier frequency set is a first carrier frequency set and a second carrier. Obtaining a first piece of information used to point to a frequency set and using that first piece of information to determine a first carrier frequency set and a second carrier frequency set, said first information. Is carried by radio resource control RRC signaling or is preset information, or obtains a second piece of information used to point to a third carrier frequency set and is based on that second piece of information. To determine a first carrier frequency set and a second carrier frequency set, the second information includes being carried by RRC signaling or being preset information.

Referring to the first aspect, in a further other implementation of the first aspect, the data to be transmitted has a data attribute, the method of which is further to point to a fourth carrier frequency set by the terminal. Acquiring the information used, a fourth carrier frequency set corresponds to a data attribute, and a fourth carrier frequency set includes a first carrier frequency and a second carrier frequency.

Referring to the first aspect, in yet another implementation of the first aspect, the data attribute is one or more of the following: priority, reliability, delay, destination address, and service type. , Including one or more of.

Referring to the first aspect, in still another implementation of the first aspect, the information used to point to the first condition includes a first channel congestion threshold, the first condition being , The information used to indicate that the channel congestion degree for the third carrier frequency is greater than or equal to the first channel congestion threshold, or to indicate the first condition, includes the second channel congestion threshold. The first condition includes that the channel congestion degree for the third carrier frequency is less than or equal to the second channel congestion threshold, or the information used to point to the first condition is the first channel. Congestion range, the first condition includes that the channel congestion degree for the third carrier frequency of the terminal is within the first channel congestion range, and the third carrier frequency is set by the network device. Or one of the preset carrier frequencies used for sidelink communication.

Referring to the first aspect, in yet another implementation of the first aspect, the third carrier frequency is determined by the network device through setting or presetting by using RRC signaling, or a third. The carrier frequency of is one of the transmission carrier frequencies of the terminal, or the third carrier frequency is the carrier frequency having the lowest channel congestion among the transmission carrier frequencies of the terminal, or The third carrier frequency is the carrier frequency having the maximum channel congestion among the transmission carrier frequencies of the terminal, or the third carrier frequency is the carrier frequency of the transmission carrier frequencies of the terminal that supports the data to be transmitted. One of the following, or the third carrier frequency is the carrier frequency having the lowest channel congestion among the carrier frequencies supporting the data to be transmitted among the transmission carrier frequencies of the terminal. The third carrier frequency is a carrier frequency having the maximum channel congestion among the carrier frequencies that support the data to be transmitted among the transmission carrier frequencies of the terminal.

Referring to the first aspect, in yet another implementation of the first aspect, the information used to point to the first condition includes a first reliability threshold, the first condition being , The information used to indicate that the reliability of the data to be transmitted is greater than or equal to the first reliability threshold, or to indicate the first condition, includes the first enumerated reliability value and the first. The condition of includes that the reliability of the data to be transmitted is equal to the first listed confidence value, or the information used to indicate the first condition includes the first reliability range. The first condition includes that the reliability of the data to be transmitted is within the first reliability range.

Referring to the first aspect, in yet another implementation of the first aspect, the method further comprises a first logic channel and a second logic by the terminal based on the data attributes for each logic channel. The channel is determined and the data attributes include one or more of priority, destination address, delay, service type, and reliability, or by the terminal, based on the correspondence between the logical channel IDs. Includes determining a first logical channel and a second logical channel.

Referring to the first aspect, in yet another implementation of the first aspect, the correspondence between the logical channel IDs is that of the ID of the second logical channel and the ID of the first logical channel. The preset value is a positive integer, including the difference or sum satisfying the preset value.

Referring to the first aspect, in yet another implementation of the first aspect, the method further sets the first carrier frequency on the side link when the second condition is met by the terminal. By using it, the transmission target data on the first logical channel is transmitted, and by using the second carrier frequency, the transmission of the transmission target data on the second logical channel is stopped. ..

Referring to the first aspect, in still another implementation of the first aspect, the method further comprises a second condition by the terminal before stopping the transmission of the data to be transmitted by the terminal. The information used to obtain the information used to point to and to point to the second condition is of the third channel congestion threshold, the fourth channel congestion threshold, and the second channel congestion range. Including, including,
The second condition is that the channel congestion for the fourth carrier frequency is equal to or higher than the third channel congestion threshold, and that the channel congestion for the fourth carrier frequency is equal to or lower than the fourth channel congestion threshold. Alternatively, it includes that the channel congestion degree for the fourth carrier frequency is within the second channel congestion range.

The method can be performed by various entities. The execution entity is not limited to the terminal, and may be a chip, a chip system, an integrated circuit, or the like instead.

According to the second aspect, the application further provides a data transmission method, wherein the terminal acquires setting information including reliability information corresponding to the first identifier, acquires data, and the said method. The reliability of the data is the first reliability, and if the first reliability corresponds to the reliability information, the sidelink buffer status report BSR is sent to the network device and the first in the sidelink BSR. The data field of is a first identifier.

The setting information further includes a first identifier such as a logical channel group identifier LCG ID, and there is a correspondence between the first identifier and the reliability information.

In addition, in one possible implementation, the method further comprises negotiating or agreeing with the rules or the rules specified in the protocol in advance by the terminal and network device. For example, at least one LCG ID is sorted in ascending order. After receiving the configuration information, the terminal determines the reliability information corresponding to each of the at least one LCG ID according to the rules agreed with the network device.

Referring to the second aspect, in one implementation of the second aspect, the reliability information includes a second reliability threshold, and the first reliability corresponds to the reliability information. It includes that the reliability is equal to or higher than the second reliability threshold, or that the reliability information includes a third reliability threshold and that the first reliability corresponds to the reliability information is the first reliability. It is said that the property includes the third reliability threshold or less, or the reliability information includes the second listed reliability value, and the first reliability corresponds to the reliability information. It is said that the reliability is equal to the second listed reliability value, or the reliability information includes the second reliability range, and the first reliability corresponds to the reliability information. Includes that reliability is within the second reliability range.

Referring to the second aspect, in another implementation of the second aspect, the setting information further includes priority information, the priority corresponding to the data is the first priority, and the first. Sending the sidelink BSR to the network device when the reliability corresponds to the reliability information is when the first reliability corresponds to the reliability information and the first priority corresponds to the priority information. Includes sending a sidelink BSR to a network device.

Referring to the second aspect, in still another implementation of the second aspect, the priority information includes a first priority threshold, and the first priority corresponds to the priority information. , The first priority includes being greater than or equal to the first priority threshold, or the priority information includes a second priority threshold and the first priority corresponds to the priority information. The first priority may include less than or equal to the second priority threshold, or the priority information may include the first listed priority values and the first priority may correspond to the priority information. , The first priority may be equal to the first listed priority value, or the priority information may include the first priority range and the first priority may correspond to the priority information. , Includes that the first priority is within the first priority range.

Referring to the second aspect, in another implementation of the second aspect, the first identifier is a first logical channel group identifier, a first destination address identifier, or a first logical channel group identifier. And a first destination address identifier.

According to a third aspect, the application further provides a data transmission method, wherein the network device transmits setting information having reliability information corresponding to the first identifier to the terminal, and the setting information is , The terminal is configured to set the first data field in the sidelink buffer status report BSR sent by the terminal to the network device as the first identifier when the reliability of the terminal's data corresponds to the reliability information. Used to configure and include receiving a sidelink BSR from the terminal.

The first identifier includes a first logical channel group identifier, a first destination address identifier, or a first logical channel group identifier and a first destination address identifier.

Referring to the third aspect, in one implementation of the third aspect, the setting information further includes priority information, and the setting information includes the reliability of the data of the terminal corresponding to the reliability information and the priority of the data. Is used to configure the terminal to set the first data field in the sidelink buffer status report BSR sent by the terminal to the network device as the first identifier when corresponds to priority information. ..

According to a fourth aspect, this application further provides a data transmission device. The apparatus includes units and components configured to perform method steps from the first aspect to the third aspect and the implementation corresponding to those aspects.

The device may be a terminal, a chip, a chip system, an integrated circuit, or the like.

According to a fifth aspect, this application provides a terminal. The terminal includes a data transmission device according to a fourth aspect, and the terminal includes components such as a processor, a transceiver, and a memory. The processor may execute a program or instruction stored in memory to implement a data transmission method according to the first to third aspects and various implementations thereof.

The processor is configured to bind to memory and read the instructions in memory. Specifically, the transceiver is configured to acquire the information used to point to the first condition and to acquire the data to be transmitted. When the first condition is met, the processor transmits the data to be transmitted on the first logical channel by using the first carrier frequency on the side link, and uses the second carrier frequency. This is configured to transmit the transmission target data on the second logical channel.

Referring to a fifth aspect, in one implementation of the fifth aspect, the processor is further configured to determine a first carrier frequency set and a second carrier frequency set, where the first carrier frequency is. The carrier frequency within the first carrier frequency set, the second carrier frequency is the carrier frequency within the second carrier frequency set, and corresponds between the first carrier frequency set and the first logical channel. There is a relationship, and there is a correspondence between the second carrier frequency set and the second logical channel.

Referring to the fifth aspect, in one implementation of the fifth aspect, the processor further determines a first carrier frequency set and a second carrier frequency set based on the first information or the second information. The first and second information is obtained by using a transceiver and the first information is used to point to a first carrier frequency set and a second carrier frequency set. , The second information is used to point to a third carrier frequency set. The first information and the second information are carried by RRC signaling or are preset information.

Referring to the fifth aspect, in another implementation of the fifth aspect, the processor is further configured to receive information used to point to a fourth carrier frequency set by using a transceiver. Configured, a fourth carrier frequency set corresponds to a first data attribute, and a fourth carrier frequency set includes a first carrier frequency and a second carrier frequency.

A data attribute comprises one or more of the following: priority, reliability, delay, destination address, and service type.

Optionally, the information used to point to the first condition includes a first channel congestion threshold, the first condition being that the channel congestion for the third carrier frequency is greater than or equal to the first channel congestion threshold. The information that includes or is used to point to the first condition includes a second channel congestion threshold, the first condition being that the channel congestion degree for the third carrier frequency is second. The information that includes being less than or equal to the channel congestion threshold or is used to indicate a first condition includes a first channel congestion range, the first condition being a channel congestion degree for a third carrier frequency. Includes being within the first channel congestion range
The third carrier frequency is one of the carrier frequencies used for sidelink communication set or preset by the network device.

Referring to the fifth aspect, in yet another implementation of the fifth aspect, the third carrier frequency is determined by the network device through setting or presetting by using RRC signaling, or a third. The carrier frequency is any one of the transmit carrier frequencies of the terminal, or the third carrier frequency is the carrier frequency having the lowest channel congestion among the transmit carrier frequencies of the terminal, or a third carrier frequency. The carrier frequency is the carrier frequency having the maximum channel congestion among the transmission carrier frequencies of the terminal, or the third carrier frequency is any of the transmission carrier frequencies of the terminal that supports the data to be transmitted. The third carrier frequency is one, or the third carrier frequency is the carrier frequency having the lowest channel congestion among the carrier frequencies supporting the data to be transmitted among the transmission carrier frequencies of the terminal, or the third carrier frequency is , The carrier frequency having the maximum channel congestion among the carrier frequencies that support the data to be transmitted among the transmission carrier frequencies of the terminal.

In reference to the fifth aspect, in yet another implementation of the fifth aspect, the information used to point to the first condition includes a first reliability threshold, where the first condition is. , The information used to indicate that the reliability of the data to be transmitted is greater than or equal to the first reliability threshold, or to indicate the first condition, includes the first listed confidence value and the first. The condition includes that the reliability of the data to be transmitted is equal to the first listed reliability value, or the information used to indicate the first condition includes the first reliability range and the first. The condition of includes that the reliability of the data to be transmitted is within the first reliability range.

Referring to the fifth aspect, in yet another implementation of the fifth aspect, the processor further determines a first logical channel and a second logical channel based on the data attributes for each logical channel. The data attributes are configured to include, or include, one or more of priority, destination address, delay, service type, and reliability.
It is configured to determine the first logical channel and the second logical channel based on the correspondence between the logical channel IDs.

The correspondence includes that the difference or the sum of the ID of the second logical channel and the ID of the first logical channel satisfies the preset value.

Referring to the fifth aspect, in yet another implementation of the fifth aspect, the transceiver further comprises using a first carrier frequency on the side link when the second condition is met. It is configured to stop transmitting the transmission target data on the first logical channel and transmitting the transmission target data on the second logical channel by using the second carrier frequency.

In reference to the fifth aspect, in yet another implementation of the fifth aspect, the transceiver is further used to point to a second condition before stopping transmission of the data to be transmitted. The information, which is configured to acquire information and is used to point to a second condition, is one of a third channel congestion threshold, a fourth channel congestion threshold, and a second channel congestion range. Including one
The second condition is that the channel congestion for the fourth carrier frequency is equal to or higher than the third channel congestion threshold, and that the channel congestion for the fourth carrier frequency is equal to or lower than the fourth channel congestion threshold. Alternatively, it includes that the channel congestion degree for the fourth carrier frequency is within the second channel congestion range.

According to a sixth aspect, this application further provides a computer storage medium. The computer storage medium can store the program, and when the program is executed, some or all of the steps in the embodiment of the data transmission method provided in this application may be performed.

According to a seventh aspect, this application further provides a network device. The network device includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver to generate the information used to point to the first condition and to send the information used to point to the first condition.

Referring to a seventh aspect, in one implementation of the seventh aspect, the information used to point to the first condition is a first channel congestion threshold, a second channel congestion threshold, or a first. Includes channel congestion range. The first condition is that the channel congestion degree for the third carrier frequency of the terminal is equal to or higher than the first channel congestion threshold value, and the channel congestion degree for the third carrier frequency of the terminal is equal to or lower than the second channel congestion threshold value. Or that the channel congestion degree for the third carrier frequency of the terminal is within the first channel congestion range.

With reference to the seventh aspect, in another implementation of the seventh aspect, the information used to point to the first condition is a first confidence threshold, a first enumerated confidence value. Alternatively, the first reliability range is included, and the first condition is that the reliability of the data to be transmitted is equal to or higher than the first reliability threshold, and the reliability of the data to be transmitted is set to the first listed reliability value. Includes equality or the reliability of the data to be transmitted is within the first reliability range.

Referring to a seventh aspect, in yet another implementation of the seventh aspect, the processor is further to generate information pointing to a second condition and to transmit information pointing to a second condition. It is configured to control the transceiver.

The information used to point to the second condition includes any one of a third channel congestion threshold, a fourth channel congestion threshold, and a second channel congestion range. The second condition is that the channel congestion for the fourth carrier frequency is equal to or higher than the third channel congestion threshold, and that the channel congestion for the fourth carrier frequency is equal to or lower than the fourth channel congestion threshold. Alternatively, it includes that the channel congestion degree for the fourth carrier frequency is within the second channel congestion range.

Referring to a seventh aspect, in yet another implementation of the seventh aspect, the processor is further configured to transmit RRC signaling by using a transceiver, wherein the RRC signaling is a third aspect. Contains information used to indicate carrier frequency. Referring to a seventh aspect, in yet another implementation of the seventh aspect, the processor is further configured to transmit RRC signaling by using a transceiver, wherein the RRC signaling is a third aspect. Contains information used to point to a carrier frequency set.

Referring to a seventh aspect, in yet another implementation of the seventh aspect, the processor is further configured to transmit RRC signaling by using a transceiver, wherein the RRC signaling is the first. Contains information used to point to a carrier frequency set and a second carrier frequency set.

Referring to a seventh aspect, in yet another implementation of the seventh aspect, the processor is further configured to transmit RRC signaling by using a transceiver, wherein the RRC signaling is a third aspect. Contains information used to point to a carrier frequency set.

Referring to a seventh aspect, in yet another implementation of the seventh aspect, the processor is further configured to transmit RRC signaling by using a transceiver, wherein the RRC signaling is a fourth aspect. Contains information used to point to a carrier frequency set, a fourth carrier frequency set corresponds to a first data attribute, and a fourth carrier frequency set includes a first carrier frequency and a second carrier. Including frequency. Data attributes include one or more of priority, reliability, delay, destination address, and service type.

Also, the memory stores instructions, and the processor is configured to read the instructions in memory and execute the method in each implementation of the seventh aspect according to the instructions.

According to an eighth aspect, this application further provides a computer program product containing instructions. When the computer program product runs on the computer, the computer is allowed to perform method steps according to all of the aforementioned embodiments.

According to the data transmission method provided in the embodiment, when the conditions for activating duplicate data transmission are met, the terminal is on the first logical channel by using different carrier frequencies. The data and the data on the second logical channel are transmitted on the side link, and the first logical channel and the second logical channel contain the same data from the same PDCP entity. Thus, on the side link, the same data can be sent on two logical channels by using different carrier frequencies, and the receiving device can receive the same duplicate data, thereby the data. Transmission reliability is improved.

It is a schematic scenario diagram of the side link according to this application. It is a schematic block diagram of the protocol stack of the LTE system according to this application. It is a flowchart of the data transmission method according to this application. It is a flowchart of another data transmission method according to this application. It is a schematic diagram of the side link BSR according to one embodiment of this application. FIG. 3 is a schematic representation of a first data field according to an embodiment of this application. It is a schematic block diagram of the data transmission apparatus according to this application. It is a schematic block diagram of the terminal according to this application.

To allow those skilled in the art to better understand the technical solutions in the embodiments of this application, and to make the objectives, features, and advantages of the embodiments of this application clearer and easier to understand: Further, referring to the accompanying drawings, the technical solution in the embodiment of this application will be described in detail.

In the specification, claims, and accompanying drawings of this application, the terms "1st", "2nd", "3rd", "4th", and the like (if any) are the same. It is intended to distinguish between things and does not necessarily point to a particular order or sequence. It should be understood that the terms used in this way are interchangeable in appropriate circumstances and therefore the embodiments of the invention described herein are described or illustrated herein. It can be implemented in an order other than the above. Also, the terms "include", "have" and other variants mean to extend to non-exclusive inclusion, eg, a process, method, system, product, or device that includes a list of steps or units does not necessarily mean. It is not limited to those steps or units and may include other steps or units not explicitly listed and other steps or units inherent in such a process, method, system, product or device. ..

Prior to describing the technical solutions of the embodiments of this application, the technical scenarios of the embodiments of this application will first be described with reference to the accompanying drawings.

The methods provided in embodiments of this application apply to LTE (Long Term Evolution) systems, or wireless communication systems that use wireless access technologies such as, for example, code division multiple access or orthogonal frequency division multiple access. Can be done. This method is also applicable to subsequent evolutionary systems of LTE systems, such as 5th generation (5G) communication systems, NR (new radio) systems, and Internet of Things systems. Embodiments of this application may further apply to WLAN systems. This is not limited in the present invention.

The technical solutions provided in the embodiments of this application may be applied to V2X communication scenarios. Specifically, the data transmission methods provided in this application include, but are not limited to, V2X scenarios and may also include, for example, Device to Device (D2D) application scenarios and Machine to Machine. , M2M) It can be applied to all scenarios where communication is performed based on the side link, such as application scenarios. The data transmission methods provided in this application can be used in all of these application scenarios and will not be described in detail.

As shown in FIG. 1, terminals 1 and 2 communicate with each other over a side link, and the communication resources used by the terminals can be scheduled, set, or preset by the network device.

Specifically, the terminal may use different modes for communication over the sidelinks. In one mode, the network appliance schedules resources. Specifically, the terminal transmits the request information to the network device, and after the network device receives the request information, the resource for the side link communication of the vehicle terminal is dynamically or quasi-dynamically scheduled.

In another mode, the terminal autonomously selects resources. Specifically, the network appliance sets the resource set for the terminal by using Radio Resource control (RRC) signaling, and the terminal autonomously sets the resource from the resource set for communication. Select. Alternatively, the terminal obtains resources from a preset resource set for communication.

The RRC signaling can be a System information Block (SIB) message or a dedicated radio resource control (Dedicated RRC) signaling. The resource set contains several time-frequency resources. Optionally, the resource set may be a resource pool.

Pre-setting means that the resource set is preset in the terminal before distribution, or is preset by the network and stored in the terminal.

Further, the terminal may randomly select a resource from the resource pool, or may select a resource from the resource pool based on the sensing mechanism. This is not limited in this application.

In a wireless communication system environment, an architecture including at least one terminal and network device shown in FIG. 1 is used to transmit data over a side link.

Further, the terminal may be a terminal device in the vehicle in V2X (for example, an in-vehicle terminal device or a terminal device carried by a user moving in the vehicle), or X (infrastructure, network, pedestrian, etc.). Or similar) terminal device, or may be a vehicle terminal or X. In addition, terminals may further include chips, integrated circuits, processors, or the like.

The terminal device in this application may be a wireless terminal. The wireless terminal can be a mobile terminal such as, for example, a mobile phone (or referred to as a "cellular" phone), and a computer having the mobile terminal. For example, a mobile terminal can be a portable, pocket-sized, handheld, computer-embedded, or in-vehicle mobile device that exchanges voice and / or data with a radio access network. For example, a mobile device may be, for example, a personal communication service (PCS) phone, a cordless phone set, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, or a personal. It can be a device such as a personal digital assistant (PDA). The terminal is instead a subscriber unit (SU), a subscriber station (SS), a mobile station (MS), a remote station (remote station, RS), a remote terminal (remote terminal, RT). ), Access terminal (AT), user terminal (user terminal, UT), user agent (UA), user equipment, user equipment (UE), or the like. good.

Optionally, network equipment includes wireless equipment. Specifically, the wireless device may be an access point (AP), or may be, for example, a base station, an extended base station, a repeater having a scheduling function, or a device having a base station function. It may be another network device. The base station may be an evolved node B (eNB) in an LTE system or a next generation node (New Radio Node, NR node, gNB) in a future 5G network, or in another system. It may be a base station. In terms of form, the base station may be a centralized base station, such as a cloud radio access network cloud RAN base station, or a distributed base station, such as a conventional GSM base station, or It may be a base station with separate controls and transfers, such as gNB. This is not limited to the embodiments of this application.

Before explaining the data transmission method provided in this application, first, the communication system protocol stack will be described.

FIG. 2 is a schematic configuration diagram of a communication protocol stack of an LTE system. From top to bottom, this protocol stack consists of an RRC layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, and a Media Access Control (MAC) layer. It includes a layer and a physical layer (PHY). The PDCP layer is used to process RRC messages on the control plane and data on the user plane. Optionally, on the user plane, after receiving data from the upper layer, the PDCP layer may perform header compression and data encryption, and then submit the data to the RLC layer.

In addition, the PDCP layer may optionally provide an in-order submission function and a duplicate packet detection function for the upper layer. Optionally, on the control plane, the PDCP layer may provide signaling transmission services for the upper layer RRC while implementing encryption and consistency protection for RRC signaling.

The MAC layer provides data transfer services on Logical Channels. Logical channels are usually classified into control channels and traffic channels. Control channels are used to carry control plane information and traffic channels are used to carry user plane information. In addition, the MAC layer is also responsible for mapping logical channels to transport channels.

The PHY layer is below the MAC layer. The PHY layer is responsible for mapping the transport channel to the physical channel.

The PDCP layer can maintain and manage one or more PDCP entities, and the RLC layer can maintain and manage one or more RLC entities. In the LTE system, the data of a single PDCP entity is delivered to one RLC entity when no duplicate data transmission occurs. After duplicate data transmission is activated, the terminal will have the same data in the PDCP layer that needs to be transmitted (the same data to be transmitted in the same PDCP entity), eg, a first logical channel and a second logical channel. Deliver separately to two logical channels such as. Specifically, the terminal separately distributes the data that needs to be transmitted in the PDCP layer to the first RLC entity and the second RLC entity. The first RLC entity corresponds to the first logical channel and the second RLC entity corresponds to the second logical channel. The correspondence may be implicit or explicit. The MAC layer then selects the resource and encapsulates the data. In duplicate data transmission, the data on the two logical channels on which the duplicate data transmission takes place must be encapsulated in different Transport Blocks (TB) and transmitted using different carrier frequencies. Will be done.

Unless otherwise specified, "duplicate data transmission" or "duplicate transmission" in this application means "duplicate transmission of PDCP layer data". In embodiments of this application, duplicate transmission of PDCP layer data is used as an example. As technology advances, "duplicate transmission of PDCP layer data" can be further extended to scenarios of duplicate transmission of other protocol layer data similar to duplicate transmission of PDCP layer data. This is not limited in this application.

Also, the schematic diagram of the protocol stack in FIG. 2 does not constitute a limitation on the protocol stack that will be applied in the future in this application. For example, future protocol stack configurations may add new tiers, add new features, remove some tiers, or simplify or combine the functionality of some tiers. You may do it. For example, in the user plane protocol stack, the service data adaptation layer (SDAP) may exist on the PDCP layer.

Further, the protocol stack can be further classified into a user plane protocol stack and a control plane protocol stack, and the user plane protocol stack may not require an RRC layer.

FIG. 3 shows a data transmission method according to an embodiment of this application. This method is used to implement duplicate transmission of PDCP layer data on the sidelinks to ensure the reliability of the data transmissions on the sidelinks.

This method involves the following steps:

Step 101: The terminal acquires the information used to point to the first condition.

The information used to point to the first condition can be carried by RRC signaling transmitted to the terminal by the network device, which RRC signaling can be a SIB message or a dedicated RRC signaling. By receiving the RRC signaling, the terminal acquires the information used to point to the first condition.

Alternatively, the information used to indicate the first condition may be carried in a data packet transmitted by the network device to the terminal device, eg, a MAC control element (abbreviated as "MAC CE"). ") May be included. By receiving the data packet, the terminal acquires the information used to indicate the first condition.

Alternatively, the information used to point to the first condition is carried on the Physical downlink control channel (PDCCH). The terminal acquires the information used to indicate the first condition by acquiring the downlink control indicator (DCI) on the PDCCH.

Alternatively, the information used to point to the first condition is included in the preset information. The terminal acquires the information used to indicate the first condition from the preset information.

In one implementation of the option, the first condition can be an activation condition.

Step 102: The terminal acquires the transmission target data. The data to be transmitted is the data to be sent or the data packet to be sent of the PDCP entity.

The terminal can acquire the information indicating the first condition and the transmission target data at different time points. For example, the terminal first acquires the transmission target data and then acquires the information indicating the first condition. Alternatively, the terminal simultaneously acquires the information indicating the first condition and the transmission target data. The time sequence is not limited in this application.

Step 103: When the first condition is met, the terminal transmits the data to be transmitted on the first logical channel by using the first carrier frequency on the side link, and the second carrier frequency. By using, the data to be transmitted on the second logical channel is transmitted.

The first carrier frequency is different from the second carrier frequency, the first logical channel and the second logical channel contain the same transmission target data, and the transmission target data is from the same PDCP entity.

In one implementation of the option, when the terminal meets the first condition, the PDCP layer of the terminal distributes the same data to be sent separately to the two RLC entities. These two RLC entities have a one-to-one correspondence with two logical channels (eg, a first logical channel and a second logical channel). The terminal then transmits the data on the first logical channel and the data on the second logical channel separately to the peer device by using two different carrier frequencies. The first logical channel and the second logical channel contain the same data to be sent from the same PDCP entity to perform duplicate data transmission over the sidelinks.

Optionally, the terminal's PDCP layer distributes the same data to be transmitted separately to two RLC entities, which causes the terminal's PDCP layer to make copies of the same data to be sent, and then those two pieces of data. Can be delivered to each of the two RLC entities.

It should be noted that the transmission target data on the first logical channel is transmitted by using the first carrier frequency, and the transmission target data on the second logical channel is transmitted by using the second carrier frequency. The time sequence with what to do is not limited in this application. It can be understood that when resources for the first carrier frequency are available to the terminal, the terminal can transmit data on the first logical channel by using the first carrier frequency. .. When resources for the second carrier frequency are available to the terminal, the terminal may transmit data on the second logical channel by using the second carrier frequency. The first carrier frequency and the first logic channel are used as examples. Certainly, it can be understood that when resources for the first carrier frequency are available to the terminal, each single transmission cannot include the entire data on the first logical channel. Data encapsulation rules for each logical channel (eg, each logical channel of the terminal and priority for each logical channel) may need to be further considered. The specific encapsulation rules are not limited in this application.

Also, based on the amount of resources acquired and / or the encapsulation rule, the MAC layer of the terminal may perform packet division on the data on a single logical channel. Therefore, whether the data to be sent on a single logical channel is sent at once or multiple times, that is, whether the data is carried in one TB or in multiple TBs. It is not limited in this application. For example, the data to be sent on the first logical channel can be segmented. In this case, the data to be transmitted needs to be transmitted by using a plurality of TBs.

In other optional implementations, the first carrier frequency may already be available to the terminal before duplicate data transmission is performed, i.e., when conventional data transmission is performed, the terminal may be the first. Data on the first logical channel is transmitted by using one carrier frequency. After the first condition is met, the terminal may add a second logical channel further. Thus, the same transmission target data from the same PDCP entity is delivered to both the first logical channel and the second logical channel. Since the first carrier frequency is already available, the terminal only needs to determine the second carrier frequency and use the second carrier frequency to transmit the data on the second logical channel. The second carrier frequency is different from the first carrier frequency.

The first carrier frequency can be a carrier frequency within the first carrier frequency set and the second carrier frequency can be a carrier frequency within the second carrier frequency set. There is a correspondence between the first carrier frequency set and the first logical channel, and there is a correspondence between the second carrier frequency set and the second logical channel. Specifically, any carrier frequency in the first carrier frequency set may be used to transmit data on the first logical channel and transmit data on the second logical channel. That is, any carrier frequency within the second carrier frequency set may be used. The first carrier frequency set is orthogonal to the second carrier frequency set. In other words, the elements in the first carrier frequency set are different from the elements in the second carrier frequency set. The correspondence may be implicit or explicit. The first carrier frequency set comprises at least one carrier frequency and the second carrier frequency set comprises at least one carrier frequency.

Optionally, a first carrier frequency set may already be available to the terminal before duplicate data transmission is performed, i.e., when conventional data transmission is performed, the terminal may be the first. Data on the first logical channel is transmitted by using the first carrier frequency in the carrier frequency set. After the first condition is met, the terminal may add a second logical channel further. Thus, the same transmission target data from the same PDCP entity is delivered to both the first logical channel and the second logical channel. Since the first carrier frequency set is already available, the terminal determines the second carrier frequency set and uses the second carrier frequency within the second carrier frequency set on the second logical channel. All you have to do is send the data in.

In this case, step 103 may further include determining a first carrier frequency set and a second carrier frequency set by the terminal. The first carrier frequency set corresponds to the first logic channel and the second carrier frequency set corresponds to the second logic channel.

The first carrier frequency set and the second carrier frequency set are determined by the terminal. Further, the first carrier frequency set corresponds to the first logic channel and the second carrier frequency set corresponds to the second logic channel. The correspondence may be implicit or explicit. The first carrier frequency set comprises at least one carrier frequency and the second carrier frequency set comprises at least one carrier frequency.

In other optional implementations, the terminal acquires the information used to point to the third carrier frequency set and bases the third carrier frequency set on the first carrier frequency set and the second carrier frequency set. The information to be determined and used to point to the third carrier frequency set may be carried by RRC signaling or preset information.

In this application, the information used to point to a "carrier frequency set" can be at least one carrier frequency identifier. The terminal may determine a "carrier frequency set" by acquiring at least one carrier frequency identifier to determine at least one carrier frequency pointed to by the at least one carrier frequency identifier. Alternatively, the information used to point to a "carrier frequency set" may be a carrier frequency identifier sequence. The terminal determines the "carrier frequency set" by acquiring the carrier frequency identifier sequence and determining the carrier frequency sequence pointed to by the carrier frequency identifier sequence.

For example, the SIB message transmitted by the base station contains information used to point to a third carrier frequency set. The indication may be suggestive or explicit. For example, the SIB message directly comprises a carrier frequency identifier sequence {CC1, CC2, CC3}, where CC1, CC2, and CC3 are different carrier frequency identifiers. Alternatively, a third carrier frequency set may include multiple transmit carrier frequencies set by the base station and used for V2X communication, each transmit carrier frequency may be pointed to by using a carrier frequency identifier. The information used to point to a third carrier frequency set can be at least one carrier frequency identifier. The terminal acquires a third set of carrier frequencies by determining at least one transmit carrier frequency by acquiring at least one transmit carrier frequency identifier.

It should be noted that the first carrier frequency set and the second carrier frequency set are not necessarily the only partitions of the third carrier frequency set. For example, different V2X services may need to be transmitted at different carrier frequencies, but some carrier frequencies within the third carrier frequency set may not support the V2X service. In this case, neither the first carrier frequency set nor the second carrier frequency set includes carrier frequencies that do not support the V2X service.

The terminal determines the first carrier frequency set and the second carrier frequency set based on the transmission carrier frequency is based on the carrier frequency included in the V2X service to be transmitted and the third carrier frequency set by the terminal. , Includes determining a first carrier frequency set and a second carrier frequency set.

In another optional implementation, the terminal determines a first carrier frequency set and a second carrier frequency set based on the RRC signaling received from the network device, the RRC signaling being the first carrier frequency set and the first carrier frequency set. Contains information used to point to two carrier frequency sets. For example, the RRC signaling transmitted by the network device may include a first carrier frequency identifier sequence and a second carrier frequency identifier sequence. The terminal acquires a first carrier frequency set and a second carrier frequency set by using this RRC signaling. The terminal establishes a correspondence between the first carrier frequency set and the first logical channel, and establishes a correspondence between the second carrier frequency set and the second logical channel.

In yet another implementation, the RRC signaling transmitted by the network device further comprises a logical channel identifier. For example, RRC signaling includes logical channel identifier 1, information used to point to a first carrier frequency set, logical channel identifier 2, information used to point to a second carrier frequency set, and the like. Including things. The information used to point to a carrier frequency set can be at least one carrier frequency identifier and is used to point to the corresponding carrier frequency. Further, the logical channel identifier 1 may point to the first logical channel, and the logical channel identifier 2 may point to the second logical channel.

The carrier frequency may also be referred to as a carrier or carrier frequency, and may be a radio wave having a specific frequency in hertz (Hz), such as 2.5 GHz or 3 GHz. In wireless communication, carrier frequencies or carriers are typically used to transmit information. The digital signal is modulated onto a high frequency carrier before being transmitted and received in the air. It can be understood that performing transmission by using carrier frequency means transmitting data by using time-frequency resources on carrier frequency.

In the following, the first condition in this method and the information used to point to the first condition will be described in detail.

In step 101, the information used to indicate the first condition includes one or more of channel congestion information and reliability information. In step 103, the first condition includes one or more of a congestion condition and a reliability condition.

When the information indicating the first condition includes channel congestion information and reliability information, or includes congestion condition and reliability condition, the condition for activating duplicate transmission of PDCP layer data is the channel congestion determination condition and the condition for activating duplicate transmission. Both reliability determination conditions must be met. In this embodiment, the activation conditions used when the information used to point to the first condition is channel congestion information or reliability information will be described separately in detail below. When the information regarding the first condition is channel congestion information and reliability information, the activation condition is the activation condition used when the information regarding the first condition in the present embodiment is channel congestion information. See description and description of the activation condition used when the information about the first condition is reliability information.

In a particular implementation, the first condition can be an activation condition and the information used to point to the first condition can be the information used to point to an activation condition.

Further, the channel congestion information includes any one of a first channel congestion threshold value, a second channel congestion threshold value, and a first channel congestion range.

The first condition is one of the following, that is,
The channel congestion for the third carrier frequency is greater than or equal to the first channel congestion threshold.
The channel congestion for the third carrier frequency is less than or equal to the second channel congestion threshold, or the channel congestion for the third carrier frequency is within the first channel congestion range.
Including any one of
The third carrier frequency is one of the carrier frequencies used for sidelink communication set or preset by the network device.

Optionally, a third carrier frequency can be set or preset by the base station by using RRC signaling, and the third carrier frequency is any one of the terminal's transmit carrier frequencies. The third carrier frequency can be the transmit carrier frequency having the lowest channel congestion among the transmit carrier frequencies of the terminal, and the third carrier frequency can be the transmit carrier of the terminal. It can be assumed that it is the transmission carrier frequency having the maximum channel congestion among the frequencies, and the third carrier frequency is one of the transmission carrier frequencies of the terminal that supports the data to be transmitted. The third carrier frequency can be the carrier frequency having the lowest channel congestion among the carrier frequencies supporting the data to be transmitted among the transmission carrier frequencies of the terminal. Alternatively, the third carrier frequency may be the carrier frequency having the maximum channel congestion among the carrier frequencies that support the data to be transmitted among the transmission carrier frequencies of the terminal.

The transmission carrier frequency of the terminal is the carrier frequency currently used by the terminal for sidelink data transmission or communication.

Further, in this application, the third carrier frequency may be the same as or different from the first carrier frequency or the second carrier frequency.

In this application, channel congestion information may be limited to identifiers, indexes, or other information used to point to or point to channel congestion information. The fact that the channel congestion information is the first channel congestion threshold is used as an example. The first channel congestion threshold may refer to the first reliability threshold by using an identifier, an index, or the first channel congestion threshold itself.

Channel congestion indicates the load state of the channel. For example, the channel congestion may be the channel busy ratio (CBR) specified in Section 5.1.30 of the 3rd Generation Partnership Project TS36.214 V15.0.1.
A heavier channel load indicates a higher channel congestion. The channel congestion corresponding to the carrier frequency, or the channel congestion for the carrier frequency, is the channel congestion in the time-frequency resource set for that carrier frequency. Specifically, the time-frequency resource set can be a resource pool. For example, the channel congestion corresponding to the carrier frequency A is the channel congestion in the first resource pool with respect to the carrier frequency A, and the channel congestion corresponding to the carrier frequency B is in the second resource pool with respect to the carrier frequency B. Channel congestion.

Further, the channel congestion may be acquired by the terminal through measurement, or may be notified to the terminal by the network device by using RRC signaling.

Example 1
The base station transmits RRC signaling to the terminal, which includes a first channel congestion threshold of 0.5, a first condition is an activation condition, and a channel congestion degree for a third carrier frequency. Is equal to or greater than the first channel congestion threshold. The terminal uses carrier frequencies {CC1, CC2, CC3} to perform sidelink data transmission. That is, the transmission carrier frequency of the terminal is {CC1, CC2, CC3}, and the channel congestion corresponding to the transmission carrier frequency is {0.2, 0.6, 0.3}, respectively. In addition, when the third carrier frequency is the carrier frequency having the maximum channel congestion among the transmission carrier frequencies, the third carrier frequency is CC2.

Since the channel congestion degree 0.6 corresponding to the third carrier frequency is larger than the first channel congestion threshold value 0.5, duplicate data transmission is activated in this case. The terminal distributes the same data to be sent in the PDCP layer to the first and second logical channels, and the data on the first logical channel is transmitted by using the first carrier frequency. The data on the second logical channel is transmitted by using the second carrier frequency.

For example, in V2X communication, when data is delivered to the access layer, the upper layer (above the access layer) delivers the data attribute or identifier corresponding to the data to the access layer by using a primitive. A data attribute or identifier may include at least one of priority, reliability, delay, destination address, service type, and the like. The data delivered to the access layer by the upper layer can be a data packet. Data attributes or identifiers may be obtained in alternative ways. This is not limited in the present invention.

Different data correspond to different priorities. In the access layer, different parameters are usually set for different data priorities, and different processes are executed.

The terminal may have several different types of services. Different types of services may be services corresponding to different types of receive ends and / or different types of transmit ends. For example, different types of services may be V2V services, V2P services, V2I services, P2V services, P2P services, P2I services, and the like. Instead, for example, different types of services are applications carried by the application layer or transmitted by a higher layer (above the access layer), such as ITS-AID (ITS Application Identifier) or PSID (Provider Service Identifier). It may be identified by using a layer identifier.

Different destination addresses point to different receiving ends. For example, when terminal A communicates with terminal B and terminal A communicates with terminal C, the corresponding destination addresses are usually different. Optionally, when the terminal performs broadcast communication, there may be a mapping relationship between the destination address and the service type.

Reliability also reflects the transmission reliability requirement / level of the data, or the degree / level of importance of the data. The transmission reliability requirement can be, but is not limited to, an end-to-end transmission reliability requirement. For example, transmission reliability is defined as 1-bit error rate, 1-symbol error rate, 1-packet error rate, or the like. Can be done. See the description in the LTE protocol specified by the 3rd Generation Partnership Project for a detailed definition. Higher reliability indicates that the data is even more important.

The delay reflects the data transmission delay request. For example, the delay can be end-to-end transmission delay, air interface delay request, packet delay amount, transmission time interval, or the like.

The data attribute can be an identifier, an index, or other information that points to or points to the data attribute, but is not limited to: For example, the data attribute is reliability. Reliability can be a reliability identifier, a reliability index, or reliability itself.

Data to be transmitted with different data attributes or different identifiers may need to be transmitted using different carrier frequencies, so that data may be transmitted on each piece of data to be transmitted. There is a allowed carrier frequency or carrier frequency set.

For example, regulations in different regions may require different V2X services to be transmitted using different carrier frequencies. For example, service type 1 is a security service, the service needs to be transmitted on the carrier frequency {CC1, CC2}, service type 2 is a non-security service, and the service uses carrier frequency {CC3}. Must be transmitted.

Also, the base station may be configured to transmit data with different priorities by using different carrier frequencies. For example, the base station uses RRC signaling to set a carrier frequency set {CC1, CC2, CC3} for data having a priority of 1 and for data having a priority of 2. Carrier frequency sets {CC1, CC4, CC5} can be set. Thus, the data having a priority of 1 is allowed to be transmitted using the carrier frequencies CC1, CC2, or CC3, and the data having a priority of 2 is allowed to be transmitted using the carrier frequencies CC1, CC4, Or it is allowed to be transmitted using CC5.

Thus, the transmission target data having the corresponding service type of 1 and the priority of 1 is the carrier frequency common to the carrier frequency set {CC1, CC2} and the carrier frequency set {CC1, CC2, CC3}. (Ie, a common set), that is, can be transmitted using only {CC1, CC2}. In other words, the carrier frequency that supports this transmission target data is CC1 or CC2.

Example 2
The transmission carrier frequency set of the terminal is {CC1, CC2, CC3}, and the data to be transmitted is allowed to be transmitted on the carrier frequency {CC1, CC3}. The third carrier frequency is the carrier frequency that is within the transmission carrier frequency of the terminal and has the maximum channel congestion among the carrier frequencies that support the data to be transmitted, and the first condition is the activation condition. When the channel congestion degree for the third carrier frequency is equal to or higher than the first channel congestion threshold value, the third carrier frequency is CC3, which corresponds to a channel congestion degree of 0.3. In this case, the conditions for performing duplicate transmission are not satisfied.

Example 3
The third carrier frequency is set by the network device by using RRC signaling, which RRC signaling can be SIB or dedicated RRC signaling. For example, the base station sets the third carrier frequency as CC2 by using dedicated RRC signaling, the first condition is the activation condition, and the channel congestion degree for the third carrier frequency is the first. It is greater than or equal to the channel congestion threshold and the terminal determines that the channel congestion degree 0.6 corresponding to CC2 is greater than 0.5. In this case, duplicate transmission is activated. The PDCP layer distributes the same data to be sent to the first and second logical channels, and the data on the first logical channel is transmitted by using the first carrier frequency and the second. It is necessary to transmit the data on the logical channel of the above by using the second carrier frequency.

In general, neither excessively low channel congestion nor excessively high channel congestion is suitable for duplicate data transmission. If the channel congestion is too low, it indicates that the channel condition is good and duplicate data transmission is not required. If the channel congestion is excessively high, it indicates that the channel condition is already very bad. In this case, if duplicate data transmission is executed, more resources need to be consumed, which further worsens the channel state. Therefore, again, duplicate data transmission is not required. Channel congestion information can be implemented as a threshold or range.

Other specific embodiments of channel congestion, methods of setting, acquiring, or determining carrier frequencies that support data to be transmitted, and embodiments of a third carrier frequency, are illustrated one by one in this application. do not.

It should be noted that the RRC signaling or preset information transmitted by the network device may further include network parameters in another active state. This is not limited to the embodiments.

It should also be noted that, instead, the RRC signaling or preset information delivered by the network device is first to facilitate the terminal's determination as to whether the PDCP layer data should be transmitted in duplicate. The condition of may be directly included.

Optionally, the information used to point to the first condition may further include reliability information. When the information used to point to the first condition is reliability information, the first condition also relates to the reliability of the data to be sent.

Specifically, the reliability information includes any one of a first reliability threshold, a first listed confidence value, and a first reliability range.

The first condition is one of the following, that is,
The reliability of the data to be transmitted is equal to or higher than the first reliability threshold.
The reliability of the data to be transmitted is equal to the first listed confidence value, the enumerated values can be a set of discrete values, identifiers, or indexes, and the reliability of the data to be transmitted is second. Equal to one listed confidence value means that the reliability of the data to be transmitted is equal to any of the items in the first listed confidence value, for example, the reliability of the data to be transmitted is If the reliability is 1, and the first listed reliability value is {reliability 1, reliability 5, reliability 6}, the reliability of the data to be transmitted is equal to the first listed reliability value. , Or that the reliability of the data to be transmitted is within the first reliability range.
Includes any one of them.

Whether or not the first reliability range includes the boundary value of the first reliability range is not limited in this application, and is not limited to, for example, (A1, B1), (A1, B1], [A1, B1). , And a plurality of possible combinations such as [A1, B1], where "(" indicates that the end value is not included and "]" includes the end value. Point to that.

The reliability information can be a specific value that reflects the reliability, for example, 99.99% or 99.999%. Alternatively, the reliability information is a relative value that reflects the reliability. For example, the reliability information may be high reliability, intermediate reliability, or low reliability. Certainly, more levels may be obtained through classifications based on multiple different confidence levels. This is not limited in this application.

In this application, the reliability information may be, but is not limited to, an identifier, an index, or other information used to point to or point to the reliability information. The fact that the reliability information is the first reliability threshold is used as an example. The first reliability threshold can be represented by using an identifier, an index, or the first reliability threshold itself.

In a particular implementation, multiple different identifiers may be used to represent the degree / level of reliability or the degree / level of materiality of the data. For example, reliability information is a relative value that reflects reliability. 1 represents high reliability, 2 represents intermediate reliability, 3 represents low reliability, or conversely, 1 represents low reliability, 2 represents intermediate reliability, and 3 represents high reliability. Represents sex.

Further, the reliability information may be carried by RRC signaling such as SIB message or dedicated RRC signaling, may be transmitted to a terminal by a network device, or may be carried by MAC CE or DCI. ..

Further, when the reliability information is carried by MAC CE, the reliability information can be embodied by using a bitmap. Different bits in the bitmap represent different reliability / importance levels or reliability ranges, and different values of the corresponding bits represent whether duplicate data transmission should be performed. For example, different values in the corresponding bits indicate whether duplicate data transmission should be activated.

For example, the reliability corresponding to data is classified into three levels: low reliability, intermediate reliability, and high reliability. Different reliability levels are represented by using fixed bits. As shown in Table 1, it can be assumed that in the bitmap, each bit corresponds to one reliability level in ascending order of reliability. Certainly, instead, each bit may, in turn, correspond to one reliability level in descending order of reliability. I won't go into details here.

When the bit is the first value, the terminal may be instructed that its reliability activates duplicate transmission of the transmission target data corresponding to the bit. When the bit is a second value, the terminal may be instructed that its reliability deactivates duplicate transmission of the transmission target data corresponding to the bit. For example, when the first value is 1, the second value can be 0.

Using the bitmap form shown in Table 1 as an example, reliability information is supported on the bitmap as shown in Table 2 below.

The reliability information is used to activate the terminal so that the data to be sent is transmitted in duplicate with high reliability. Specifically, when the data to be sent in the PDCP layer of the terminal corresponds to high reliability, the terminal distributes the data to be sent in the PDCP layer to two different logical channels, and the data to be sent are delivered. Transmit by using different carrier frequencies.

Also, high reliability, intermediate reliability, and low reliability may correspond to different reliability values. For example, the reliability of data corresponding to high reliability is higher than 99.999%.

Also, the bits in the bitmap may instead be used to specify the reliability range, as shown in Table 3. The inclusion of boundary values is not limited in this application.

Specifically, the form of the bitmap shown in Table 3 is used as an example. When the reliability information is carried by a bitmap as shown in Table 3, the reliability information is used to duplicate the data to be sent whose reliability is in the range of 99.99-99.99999%. Activate the terminal to transmit. Specifically, the terminal distributes the data to be sent in the PDCP layer whose reliability is in the range of 99.99-99.9999% to two different logical channels, and the data to be sent. Is transmitted using different carrier frequencies.

Optionally, the reliability range may be implicit instead. The reliability range shown in FIG. 3 may also be represented by Table 4. Referring to Table 4, the meaning pointed to by the last bit in the bitmap can be 99.0-99.9%.

When it is detected that the first condition is satisfied, the terminal executes the above-mentioned step 103. Conversely, if the first condition is not met, the action of separately delivering the data in the PDCP layer to two different logical channels is not triggered.

For example, the first condition is an activation condition, and the reliability information set by the network device using RRC signaling is 1 indicating high reliability or high importance. Duplicate data transmission is activated when the terminal is of high reliability or importance corresponding to the data to be sent. The PDCP layer distributes the data to be sent to two different logical channels.

For example, the first condition is the activation condition, and the reliability information set by the network device using RRC signaling is the first reliability threshold of 99.99%. Duplicate data transmission is activated when the reliability of the data to be sent on the terminal side is 99.999%, which is greater than the first reliability threshold. The PDCP layer distributes the data to be sent to two different logical channels.

For example, the first condition is an activation condition, the reliability information set by the network device using RRC signaling is 1 indicating high reliability, and the data reliability corresponding to high reliability is 9. It is over .999%. Duplicate data transmission is activated when the reliability of the data to be sent on the terminal side is 99.9999%, which is greater than the first reliability threshold. The PDCP layer distributes the data to be sent to two different logical channels.

Optionally, the first carrier frequency may already be available to the terminal before the duplicate data transmission is performed, i.e. when the conventional data transmission is performed, and the terminal is the first carrier. By using frequency, the data on the first logical channel is transmitted. Alternatively, the first carrier frequency set may already be available to the terminal, where the terminal is on the first logical channel by using the first carrier frequency within the first carrier frequency set. To send.

Further, the terminal is further used for transmission based on the data reliability such as the first reliability and the first logical channel having a correspondence relationship with the first reliability. The carrier frequency may be determined. The correspondence may be explicit or implicit.

For example, a base station uses dedicated RRC signaling to set a correspondence between a terminal reliability identifier and a logical channel. For example, the first reliability identifier 1 corresponds to the logical channel identifier 1 (LCID1), and the first reliability identifier 2 corresponds to the logical channel identifier 2 (LCID2). A single piece of data is delivered to only a single logical channel before duplicate transmission is performed, i.e., when traditional data transmission is performed. When the first data reliability corresponding to the data 1 is the first reliability identifier 1, the terminal distributes the first data to the first logical channel and uses the first carrier frequency. The first data is transmitted. The logical channel identifier 1 can point to the first logical channel. As can be understood, a plurality of different reliability identifiers may instead correspond to one LCID.

In one feasible implementation, the terminal determines the first carrier frequency and the second carrier frequency, but is not limited to, the RRC layer determines the first carrier frequency and the second carrier frequency. It can be. The RRC layer can determine the different carrier frequencies used to send the data on the two logical channels, i.e., the first carrier frequency and the second carrier frequency. Specifically, the application is not limited to this, but the following techniques may be used to determine.

Specifically, the first condition is the activation condition. The information used to point to the first condition includes a first channel congestion threshold of 0.6 and a first reliability threshold of 99.99%, and the carrier frequency set of the terminal is {CC1, CC2, CC3. }, The channel congestion corresponding to these transmission carrier frequencies is {0.2, 0.6, 0.3}, respectively, and the third carrier frequency is the largest among these transmission carrier frequencies. The carrier frequency with the channel congestion of. In this case, the third carrier frequency is CC2. The channel congestion 0.6 corresponding to the third carrier frequency is larger than the first channel congestion threshold 0.5, and the reliability corresponding to the data to be transmitted by the terminal is the first reliability threshold 99.99. Since it is 99.999%, which is greater than%, duplicate data transmission is activated. The PDCP layer distributes the data to be sent separately to two different logical channels.

In one possible implementation, the terminal determines a first carrier frequency and a second carrier frequency by using signaling delivered by a network device. Specifically, if the RRC signaling or preset information transmitted by the network device to the terminal contains at least two carrier frequency identifiers, the terminal determines the first carrier frequency and the second carrier frequency.

Optionally, the RRC signaling or preset information transmitted by the network appliance to the terminal includes information used to point to a third carrier frequency set. For example, the RRC signaling or preset information includes a plurality of carrier frequency identifiers pointing to a plurality of carrier frequencies that may be set or preset by a network device and used for sidelink communication. The terminal determines the first carrier frequency and the second carrier frequency based on the third carrier frequency set, and the first carrier frequency and the second carrier frequency belong to the third carrier frequency set. As can be understood, the third carrier frequency set may be preset instead.

Alternatively, the terminal determines a first carrier frequency set and a second carrier frequency set based on a third carrier frequency set, and all carrier frequencies in the first carrier frequency set and the second carrier frequency set are all. , Belonging to the third carrier frequency set, the elements in the first carrier frequency set are different from the elements in the second carrier frequency set.

The terminal selects the first carrier frequency from the first carrier frequency set and the second carrier frequency from the second carrier frequency set. Selecting the first carrier frequency from the first carrier frequency set and selecting the second carrier frequency from the second carrier frequency set may be implemented in the RRC layer of the terminal or in the MAC layer. It may be implemented.

In one other possible implementation, the data to be transmitted has data attributes, the data attributes correspond to carrier frequencies within a third carrier frequency set, and the correspondence may be implicit. It may be explicit. Data attributes can include one or a combination of priority, reliability, delay, destination address, and service type.

Data attributes can be, but are not limited to, identifiers, indexes, or other pointing or instructional information. For example, the data attribute is reliability. Reliability can be a reliability identifier, a reliability index, or reliability itself.

After receiving the information used to point to the third carrier frequency set from the network device, the terminal determines the fourth carrier frequency set based on the data attributes of the data to be transmitted. For example, a fourth carrier frequency set may include all available carrier frequency resources suitable for the data to be transmitted. It can be understood that the terminal does not necessarily have to use all available carrier frequency resources. According to the capabilities of the terminal (eg, transmission chain capability) or another constraint (carrier frequency supported by the data packet to be transmitted, or the like), the terminal may be the first in a period of time or in a single transmission of information. Only some carrier frequencies within the carrier frequency set of 4 may be used. The terminal determines the first carrier frequency set and the second carrier frequency set based on the fourth carrier frequency set, or directly based on the fourth carrier frequency set, the first carrier frequency and the second carrier frequency set. Determine the carrier frequency of 2.

The third carrier frequency set may be the same as or different from the fourth carrier frequency set. This is not limited in this application.

For example, the priority of the data to be transmitted is 1, and the base station sets the information used to indicate the carrier frequency set as the correspondence between the priority and the carrier frequency set. If there are two priorities, the data having the priority of 1 has a correspondence with the carrier frequency set {CC1, CC2, CC3, CC4}, and CC1, CC2, CC3, and CC4 have four different carrier frequencies. The data having a priority of 2 has a correspondence relationship with the carrier frequency set {CC2, CC3, CC5, CC6}. After receiving the correspondence mentioned above, the terminal may determine the total available carrier frequency resource corresponding to the data to be transmitted, based on the priority of the data to be transmitted. When it is determined that the priority of the data to be transmitted is 1, the corresponding fourth carrier frequency set is {CC1, CC2, CC3, CC4}.

The correspondence between the priority and the carrier frequency in the third carrier frequency set may be implicit, explicit, or a plurality of other embodiments. May have. For example, the setting information of each carrier frequency carries the priority corresponding to the carrier frequency. For example, the setting information of the carrier frequency CC1 includes {identifier of carrier frequency 1 and identifier of priority 1}, and the setting information of carrier frequency CC2 includes {identifier of carrier frequency 2 and identifier of priority 1}. This form may indicate that both carrier frequency 1 and carrier frequency 2 support transmission target data having a priority of 1. When the priority of the data to be transmitted is 1, the fourth carrier frequency set is {CC1, CC2}. Certainly, the fourth carrier frequency set may include only one carrier frequency.

For example, the first data attribute of the data to be transmitted includes priority 1 and destination address 1. The base station sets that data priority 1 has a correspondence with the carrier frequency set {CC1, CC2, CC3, CC4}, where CC1, CC2, CC3, and CC4 represent four different carrier frequencies and also data. Priority 2 is set to have a correspondence with the carrier frequency set {CC2, CC3, CC5, CC6}. In addition, the base station sets that the destination address 1 has a correspondence with the carrier frequency set {CC1, CC2}, and the destination address 2 has a correspondence with the carrier frequency set {CC3, CC4}. After receiving the correspondence mentioned above, the terminal may determine the total available carrier frequency resource corresponding to the data to be transmitted, based on the priority of the data to be transmitted and the destination address. When it is determined that the priority corresponding to the transmission target data is 1 and the destination address corresponding to the transmission target data is 1, the corresponding fourth carrier frequency set is {CC1, CC2}.

Similarly, when the data attribute is any one or combination of the first reliability, the first delay, the first destination address, and the first service type, the terminal also sets the carrier frequency. Based on the information to point to, the carrier frequency set supported by the current data to be transmitted can be determined. The terminal then determines a first carrier frequency set and a second carrier frequency set based on that carrier frequency set, or directly based on that carrier frequency set, a first carrier frequency and a second carrier frequency set. Select a carrier frequency. The carrier frequencies in the first carrier frequency set and the carrier frequencies in the second carrier frequency set all belong to the fourth carrier frequency set.

In one other possible implementation, the data to be transmitted has a data attribute, which corresponds to a carrier frequency in the first carrier frequency set and a carrier frequency in the second carrier frequency set. The correspondence may be implicit or explicit. Data attributes can include one or a combination of priority, reliability, delay, destination address, and service type.

Data attributes can be, but are not limited to, identifiers, indexes, or other pointing or instructional information. For example, the data attribute is reliability. Reliability can be a reliability identifier, a reliability index, or reliability itself.

The terminal receives information from the network device, the information being used to point to a first carrier frequency set and a second carrier frequency set, and a first carrier frequency set and a second carrier frequency. Contains information used to point to the data attributes that correspond to the set. The terminal determines the first carrier frequency set and the second carrier frequency set based on the data attributes of the transmission target data, or directly the first carrier frequency and the first carrier frequency set based on the data attributes of the transmission target data. Determine the carrier frequency of 2. This information can be carried by RRC signaling or preset messages.

For example, the dedicated RRC signaling transmitted by the network device includes {first destination address identifier, CC1, CC2} and {second destination address identifier, CC3, CC4}.

The destination address corresponding to the data to be sent by the terminal is the first destination address. The terminal can determine that the first carrier frequency is CC1 and the second carrier frequency is CC2 based on the dedicated RRC signaling, where CC1 can point to the first carrier frequency. CC2 can refer to a second carrier frequency.

In another example, the SIB message transmitted by the network device includes {first destination address identifier, {CC1, CC2}, {CC3, CC4}} and {second destination address identifier, CC3, CC4}. ..

If the destination address corresponding to the data to be sent by the terminal is the first destination address, the terminal has a first carrier frequency set of {CC1, CC2} and a second carrier based on dedicated RRC signaling. Determine that the frequency set is {CC3, CC4}.

In another example, the dedicated RRC signaling transmitted by the network device is {first destination address identifier, first reliability identifier, CC1, CC2} and {second destination address identifier, first reliability identifier. , CC3, CC4}.

If the destination address corresponding to the data to be sent by the terminal is the first destination address and the reliability corresponding to the data to be sent is the first reliability, the terminal is based on dedicated RRC signaling. It is determined that the first carrier frequency is CC1 and the second carrier frequency is CC2, where CC1 can refer to the first carrier frequency and CC2 can refer to the second carrier frequency.

In another example, the dedicated RRC signaling transmitted by the network device is {first destination address identifier, first reliability identifier, {CC1, CC2}, {CC3, CC4}} and {second destination address. Includes identifier, first reliability identifier, CC3, CC4}.

If the destination address corresponding to the data to be sent by the terminal is the first destination address and the reliability corresponding to the data to be sent is the first reliability, the terminal is based on dedicated RRC signaling. It is determined that the first carrier frequency set is {CC1, CC2} and the second carrier frequency set is {CC3, CC4}.

If the current transmission carrier frequency of the terminal does not include the first carrier frequency or the second carrier frequency, the terminal transmits data on the first logical channel by using the first carrier frequency. , Carrier selection or carrier reselection may be performed to transmit data on the second logical channel by using the second carrier frequency. This is not limited in the present invention.

According to the data transmission method provided in this embodiment, when the conditions for activating duplicate data transmission are met, the terminal is on the sidelink with the data on the first logical channel and the second logic. The data on the channel is transmitted by using different carrier frequencies. Thus, on the side link, the same data packet can be sent on two logical channels by using different carrier frequencies, and the receiving device can receive the same duplicate data packet, thereby. , The reliability of data transmission is improved.

Further, the first carrier frequency and the second carrier frequency may be determined by the RRC layer of the terminal or may be determined by the MAC layer of the terminal.

For example, after duplicate data transmission is activated, the PDCP layer delivers the same data to be sent to the first and second logical channels, while the RRC layer is the first used for duplicate data transmission. It is not necessary to notify the MAC layer of the first logical channel and the second logical channel. Therefore, the MAC layer needs to determine two logic channels used for duplicate transmission, namely, a first logic channel and a second logic channel. In addition, the MAC layer can further maintain and manage a plurality of logical channels.

Specifically, the method of determining the logical channel by the MAC layer includes several possible implementations:

In one possible implementation, the MAC layer determines a first logical channel and a second logical channel based on the data attributes of each logical channel. Data attributes can be one or a combination of priority, destination address, delay, service type, and reliability.

It can be understood that the first logical channel and the second logical channel contain the same data to be sent and have the same data attributes corresponding to the data. For example, the data attribute includes a priority and a destination address, and the data to be transmitted has a first priority and a first destination address. Therefore, the data attribute corresponding to the first logical channel and the data attribute corresponding to the second logical channel are the same. Specifically, the priority of both the first logical channel and the second logical channel is the first priority, and the destination addresses of both the first logical channel and the second logical channel correspond to each other. Is the first destination address. The first logical channel and the second logical channel can be determined by detecting whether the data attributes for the logical channels are the same.

In addition, the terminal needs to further acquire information about the data attributes for the logical channel before it can detect if the data attributes for the logical channel are the same.

The MAC layer detects whether the identification information or data attributes for the two logical channels are the same. If the identification information or data attributes are the same, it indicates that the two logical channels used for duplicate data transmission already exist. In this case, duplicate data transmission may be performed.

Optionally, the MAC layer preliminarily determines a first logical channel and a second logical channel by detecting data attributes for each logical channel. In addition, the MAC layer further determines if there is data to be transmitted on the first logical channel and / or on the second logical channel in order to determine if duplicate data transmission has taken place in the PDCP layer. There is a need. If the MAC layer detects that the data to be transmitted exists on both of those logical channels and the data attributes for the first logical channel and the second logical channel are the same, it is a duplicate in the PDCP layer. It indicates that the data transmission is activated, that is, the data to be transmitted in the same PDCP layer is delivered to the two logical channels.

For example, there are three logical channels in the MAC layer that are referred to as logical channel 1, logical channel 2, and logical channel 3, respectively. The data attributes (eg, data priority) corresponding to logical channels 1, 2, and 3 are priority 1, priority 2, and priority 1, respectively. Since the data attributes for logical channels 1 and 3 are the same (both have priority 1), it is determined that logical channel 1 and logical channel 3 are logical channels used for duplicate data transmission.

In addition, the terminal further indicates information to the MAC layer via the RRC layer in order to indicate the first logical channel and the second logical channel, or to indicate that the duplicate transmission in the PDCP layer is activated. Can be sent.

Optionally, when a logical channel is established, a correspondence may be established between each logical channel and the data attributes corresponding to each logical channel. The data attributes that correspond to a logical channel relate to the data on the logical channel. The data attribute corresponding to the logical channel may be equivalent to the data attribute corresponding to the data on the logical channel.

In another implementation, there can be a correspondence or a pairing relationship between the ID of the first logical channel and the ID of the second logical channel, and these logical channels. Duplicate data transmission is performed on both sides. Correspondence may be set or preset by the base station by using RRC signaling, or may be specified by the protocol. In this case, the MAC layer determines the first logical channel and the second logical channel depending on whether the IDs of the logical channels satisfy the correspondence.

The correspondence can be expressed by using the arithmetic relation between the logical channel IDs of the two logical channels, or by using a specific correspondence. In this application, the logical channel identifier may be the logical channel ID.

For example, the logical channel for duplicate transmission satisfies a correspondence relationship, for example, the difference between the ID of the second logical channel and the ID of the first logical channel, or the sum thereof satisfies a preset value. We will use the example where the difference satisfies the preset value. For example, LCID2-LCID1 = M, where LCID2 represents the ID (Identity) of the second logical channel, LCID1 represents the ID of the first logical channel, and M is a preset value and a positive integer. be. Alternatively, the correspondence between the two logical channels is explicitly expressed, for example, {logical channel 1, logical channel 11} and {logical channel 2, logical channel 12}.

For example, there is a correspondence between the logical channel 1 and the logical channel 11, and there is a correspondence between the logical channel 2 and the logical channel 12. Assuming that M is equal to 10, both of these correspondences satisfy the ID of the second logical channel − the ID of the first logical channel = M. When duplicate data transmission is not performed, the ID of the logical channel used by the terminal is 1-10.

When the terminal detects the existence of a logical channel with LCIDs 1 and 11, it indicates that the two logical channels used for duplicate data transmission already exist. In this case, duplicate data transmission can be performed or it can be determined that duplicate data transmission is triggered. Specifically, the same data packet will be delivered to two different logical channels. The terminal determines that the logical channel 1 is a logical channel that matches the logical channel 11 based on the correspondence between the logical channel ID of the logical channel 1 and the logical channel ID of the logical channel 11. It can be determined that the logical channel of 1 is the logical channel 1 and the second logical channel is the logical channel 11.

In one implementation of the other option, the MAC layer preliminarily determines the first and second logical channels by using the correspondence between the IDs of the logical channels. In addition, the MAC layer needs to further determine if the data to be transmitted exists on the first logical channel and / or the second logical channel in order to determine whether duplicate data transmission has occurred in the PDCP layer. There is. If the MAC layer detects that the data to be transmitted exists on both of these logical channels and the IDs of the first logical channel and the second logical channel satisfy the correspondence, it is a duplication in the PDCP layer. It indicates that the data transmission is activated, that is, the data to be transmitted in the same PDCP layer is distributed to the two logical channels.

When the terminal detects the existence of a logical channel with LCIDs 1 and 11, and the terminal determines that data exists on the logical channel with LCID11, it may be determined that duplicate data transmission has been triggered. Specifically, the same data packet is delivered to two different logical channels.

Alternatively, the first carrier frequency and the second carrier frequency may be determined by the MAC layer of the terminal. The determination method is not limited to the following, but is specifically as follows.

The MAC layer receives information delivered by the RRC layer and used to point to a third carrier frequency set or to point to a fourth carrier frequency set, followed by a third carrier frequency set. Alternatively, the first carrier frequency and the second carrier frequency are determined based on the fourth carrier frequency set. One particular method is the same as the method of determining the first carrier frequency and the second carrier frequency by the RRC layer, the details of which are not described again here. It can be understood that the first carrier frequency and the second carrier frequency may instead be from the first carrier frequency set and the second carrier frequency set, respectively, the first carrier frequency set. Is orthogonal to the second carrier frequency set. One particular method is the same as the method of determining the first carrier frequency set and the second carrier frequency set by the RRC layer, the details of which are not described again here.

The time sequence between determining the first logical channel and the second logical channel by the MAC layer and determining the first carrier frequency and the second carrier frequency by the MAC layer is limited in this application. It is not to be done.

Further, the method in the above-described embodiment further stops the distribution of the transmission target data to the first logical channel and the second logical channel by the PDCP layer of the terminal when the second condition is satisfied. including.

In addition, this process obtains information used by the terminal to point to the second condition and, when the second condition is met, by using the first carrier frequency by the terminal on the sidelink. It comprises transmitting transmission target data on the first logical channel and stopping transmission of transmission target data on the second logical channel by using a second carrier frequency.

The information used to point to the second condition includes any one of a third channel congestion threshold, a fourth channel congestion threshold, and a second channel congestion range.

The second condition is
The channel congestion degree for the fourth carrier frequency is equal to or higher than the third channel congestion threshold value.
Includes that the channel congestion for the fourth carrier frequency is less than or equal to the fourth channel congestion threshold, or that the channel congestion for the fourth carrier frequency is within the second channel congestion range.

The fourth carrier frequency can be set or preset by the network device by using RRC signaling, and the fourth carrier frequency can be any one of the transmit carrier frequencies of the terminal. The fourth carrier frequency can be the transmit carrier frequency having the lowest channel congestion among the transmit carrier frequencies of the terminal, and the fourth carrier frequency is the largest channel congestion among the transmit carrier frequencies of the terminal. It can be a transmit carrier frequency with a degree, and the fourth carrier frequency can be any one of the transmit carrier frequencies of the terminal that supports the data packet to be transmitted. , The fourth carrier frequency can be the carrier frequency within the transmit carrier frequency of the terminal that has the lowest channel congestion of the carrier frequencies that support the data packet to be transmitted, or the fourth carrier frequency. The carrier frequency can be a carrier frequency within the transmission carrier frequency of the terminal that has the highest channel congestion among the carrier frequencies that support the data packet to be transmitted.

Optionally, the fourth carrier frequency is the carrier frequency in the first carrier frequency set or the second carrier frequency set. Further, the first carrier frequency set corresponds to the first logic channel and the second carrier frequency set corresponds to the second logic channel. The fourth carrier frequency may be the same as or different from the third carrier frequency.

Optionally, the fourth carrier frequency can be any one of the transmit carrier frequencies of the terminal belonging to the first carrier frequency set, and the fourth carrier frequency belongs to the first carrier frequency set. It can be the transmit carrier frequency with the lowest channel congestion in the transmit carrier frequency of the terminal, and the fourth carrier frequency is the largest channel in the transmit carrier frequency of the terminal belonging to the first carrier frequency set. It can be a transmit carrier frequency with a degree of congestion, where the fourth carrier frequency is of the transmit carrier frequencies within the transmit carrier frequency of terminals that support the data packet to be transmitted and belong to the first carrier frequency set. The fourth carrier frequency is the smallest channel among the carrier frequencies within the transmit carrier frequency of terminals that support the data packet to be transmitted and belong to the first carrier frequency set. It can be a carrier frequency with a degree of congestion, or the fourth carrier frequency is within the carrier frequency within the transmit carrier frequency of a terminal that supports the data packet to be transmitted and belongs to the first carrier frequency set. Can be the carrier frequency with the highest channel congestion.

Alternatively, the fourth carrier frequency can be any one of the transmit carrier frequencies of the terminal belonging to the second carrier frequency set, and the fourth carrier frequency is the terminal belonging to the second carrier frequency set. It can be the transmit carrier frequency with the lowest channel congestion among the transmit carrier frequencies of, and the fourth carrier frequency is the largest channel congestion among the transmit carrier frequencies of the terminals belonging to the second carrier frequency set. It can be a transmit carrier frequency with a degree, and the fourth carrier frequency is one of the transmit carrier frequencies within the transmit carrier frequency of the terminal that supports the data packet to be transmitted and belongs to the second carrier frequency set. The fourth carrier frequency can be any one, and the fourth carrier frequency is the lowest channel congestion among the carrier frequencies within the transmit carrier frequency of the terminal that supports the data packet to be transmitted and belongs to the second carrier frequency set. It can be a carrier frequency with a degree, or the fourth carrier frequency is among the carrier frequencies within the transmit carrier frequency of the terminal that supports the data packet to be transmitted and belongs to the second carrier frequency set. It can be the carrier frequency with the highest channel congestion.

In this embodiment, when the terminal satisfies the second condition, the terminal transmits the transmission target data in the PDCP entity to the first logical channel and the second logical channel in order to save network resources. Stop that.

Optionally, the second condition can be a deactivation condition.

In another embodiment of this application, a data transmission method is further provided. In this method, the terminal reports the reliability of the side link data of the terminal to the network device so that the network device can better schedule the resources for transmitting the side link data.

As shown in FIG. 4, this method may include the following steps:

Step 201: The terminal acquires the setting information from the network device, and the setting information includes the reliability information corresponding to the first identifier.

Optionally, the configuration information further includes a first identifier. The first identifier includes a first logical channel group identifier, a first destination address identifier, or a first logical channel group identifier and a first destination address identifier.

Specifically, the terminal can acquire the setting information by a plurality of methods as follows.

In one possible approach, the terminal obtains configuration information by using RRC signaling, which RRC signaling may be SIB message or dedicated RRC signaling. The terminal receives the RRC signaling and acquires the reliability information corresponding to the first identifier.

In another possible method, the terminal acquires the setting information by carrying the setting information and using a data packet transmitted by the network device. For example, the configuration information may be included in a MAC control element (abbreviated as "MAC CE"). After receiving the data packet, the terminal acquires the first identifier, the reliability information, and the correspondence between the first identifier and the reliability information.

In yet another possible implementation, the configuration information is carried on the PDCCH and the terminal obtains a DCI on the PDCCH to obtain a first identifier, reliability information, and a first identifier and reliability information. Get the correspondence between and.

In yet another possible implementation, the network device sets the setting information in the preset information, and the terminal acquires the setting information from the preset information.

The first identifier may be a first Logical Channel Group Identity (LCG ID) or a first destination address identifier, or a first LCG ID and a first destination address identifier. There may be.

Reliability information includes reliability thresholds, listed confidence values, or reliability ranges.

The reliability information can also be, but is not limited to, an identifier, an index, or other information used to point to or point to the reliability information. The correspondence between the first identifier and the reliability information may be implicit or explicit.

In the following, the first identifier is the first LCG ID, the confidence information is the enumerated confidence value, the enumerated confidence values include a series of discrete confidence values, and the confidence value is the reliability. Use the example pointed to by using an identifier.

In one possible implementation, the configuration information generated by the network device can include at least one LCG ID and at least one reliability identifier, eg, LCG ID 1, reliability identifier 1, LCG ID 2, and reliability. It may include identifier 2. LCG ID 1 corresponds to reliability identifier 1, LCG ID 2 corresponds to reliability identifier 2, reliability identifier 1 can point to the enumerated confidence values 1, and reliability identifier 2 corresponds to the enumerated confidence values 2. Can be pointed to. After receiving the setting information, the terminal can identify that the LCG ID 1 has a correspondence with the listed trust value 1 and the LCG ID 2 has a correspondence with the listed trust value 2 by using the setting information. ..

In one other possible implementation, the configuration information may include at least one reliability information without including the LCG ID. The terminal may identify the LCG ID corresponding to the at least one reliability information based on a pre-agreed sequence or rule. The above sequence may be specified in the protocol or may be agreed by the network device and the terminal device through negotiation. For example, since the LCG ID can be a sequence number, both parties can agree that the LCG IDs are arranged in ascending order. For example, if the LCG IDs are numbered 0, 1, 2, and 3 in sequence, the configuration information may include at least one reliability information without including the LCG ID. The terminal may identify the logical channel group identifier corresponding to the at least one reliability information according to the sequence of the at least one reliability information.

For example, the setting information includes only {reliability identifier 1}, {reliability identifier 2, reliability identifier 3}, {reliability identifier 4}, and {reliability identifier 5, reliability identifier 6}. Both parties agree that the LCG IDs are listed in ascending order. After receiving the configuration information, the terminal is numbered {reliability identifier 1} as a logical channel group identifier numbered 0 and {reliability identifier 2, reliability identifier 3} as 1. It was identified that the {reliability identifier 4} and {reliability identifier 5, reliability identifier 6} correspond to the logical channel group identifiers numbered 2 and 3, respectively. obtain.

Certainly, it can be understood that the first configuration information may contain only one reliability information, which corresponds to the logical channel group identifier numbered 0.

Step 202: The terminal acquires the data, and the data reliability of the data is the first data reliability.

Specifically, each sidelink data has a data attribute, which may include reliability. For example, the reliability of the data acquired by the terminal is the first reliability.

For the data attributes, refer to the related description in step 103 of the above-described embodiment. Details will not be explained here again. The time sequences of steps 201 and 202 are not limited in this application. Step 202 may be executed before step 201, or step 201 and step 202 may be executed at the same time.

Step 203: When the first reliability corresponds to the reliability information, the sidelink buffer status report BSR is transmitted to the network device, and the first data field in the sidelink BSR is the first identifier.

Specifically, the fact that the first reliability corresponds to the reliability information includes the following.

The reliability information includes a second reliability threshold, and the fact that the first reliability corresponds to the reliability information includes that the first reliability is equal to or higher than the second reliability threshold.
The reliability information includes a third reliability threshold, and the fact that the first reliability corresponds to the reliability information includes that the first reliability is equal to or less than the third reliability threshold, or the reliability. The sex information includes a second enumerated confidence value, and the fact that the first reliability corresponds to the reliability information includes that the first reliability is equal to the second enumerated confidence value. The enumerated values can be a set of discrete values, identifiers, or indexes, and if the first reliability is equal to the second enumerated confidence value, the first reliability is the second enumeration. It means that it is equal to any item in the given confidence value, for example, the first reliability is reliability 1 and the second listed confidence value is {reliability 1, reliability 5 , Reliability 6}, the first reliability corresponds to the second listed confidence value, or the reliability information includes a second reliability range and the first reliability is reliability. Corresponding to information includes that the first reliability is within the second reliability range.

In one implementation of the option, the terminal has data, the reliability corresponding to the data is the first reliability, and corresponds to the reliability information corresponding to the first identifier. The terminal sets the first data field in the sidelink buffer status report BSR as the first identifier, sends the buffer status report (BSR) to the network device, and its reliability is the first. Notify the network device that the terminal has data corresponding to the reliability information. Thus, the network device knows the data reliability of the side link data of the terminal.

In addition, a specific BSR transmission trigger condition may exist. This is not limited in the present invention.

For example, the data format of the sidelink BSR, the BSR transmission trigger condition, and the method of calculating or counting the data buffer size are described in Chapter 5.14.1.4 and Chapter 5.14.1.4 in the 3rd Generation Partnership Project TS36.321 V15.0.0. See Related Protocols in 6.1.3.

Optionally, the BSR is included in the MAC PDU sent by the terminal to the base station.

Optionally, the BSR is included in the MAC CE transmitted by the terminal to the base station.

FIG. 5 shows the format of the LTE-V2X sidelink BSR. The BSR contains a plurality of different data fields for pointing to or reflecting a plurality of different information. For example, the LTE-V2X sidelink BSR has a destination address index field used to identify the destination address, a data buffer size field used to identify the data buffer size, and a data buffer size field. Contains the logical channel group identifier field (LCG ID) used to identify the logical channel group identifier. Different data fields can occupy different bits. For example, the destination address index field may occupy 3 bits. This is not limited in the present invention. The format of the conventional LTE V2X sidelink BSR does not impose any restrictions on this application, which uses a strictly different BSR format.

Optionally, the terminal may instead set a second data field in the BSR as the terminal's data buffer size so that the base station can get more information about the sidelink data. Optionally, the data buffer size of the terminal is the data size of the side link data that is that of the terminal and satisfies the reliability information. Certainly, as can be understood, FIG. 5 merely provides some examples. A single BSR may include multiple destination address index fields, data buffer size fields, and logical channel group identifier fields.

For example, the side link data to be sent by the terminal is data 1, data 2, and data 3, and the reliability corresponding to the data 1 is the reliability identifier 1, the destination address 1, and the data size B1, and the data. The reliability corresponding to 2 is the reliability identifier 2, the destination address 1, and the data size B2, and the reliability corresponding to the data 3 is the reliability identifier 4, the destination address 2, and the data size B3. Data 1, data 2, and data 3 can each contain a plurality of data packets. In the V2X service, different services may have different destination addresses. Optionally, the BSR may contain multiple different destination addresses.

In addition, the setting information includes the first identifier and the reliability information having a correspondence relationship with the first identifier, for example, the reliability identifier 1 and the reliability identifier 2. The first identifier includes the LCG ID 1, and the reliability information includes the reliability identifier 1 and the reliability identifier 2. In this case, the side link BSR reported to the network device by the terminal after receiving the setting information can include {destination address 1, LCG ID 1, C1}, and C1 has the data size B1 and the data size B2. Represents an identifier or index corresponding to the sum of. After receiving the sidelink BSR, the network appliance knows that the terminal has data whose destination address is 1, has priority 1 and 2, and has a data amount of C1 for the terminal. It may prepare for subsequent resource scheduling performed by the network device.

Certainly, as can be understood, the configuration information is further the correspondence between the LCG ID 2 and the reliability information, more first identifiers, more reliability identifiers, and first identifiers. It may include a correspondence between and the reliability identifier. This is not limited to the embodiments of this application.

Optionally, C1 may be an index of the data size interval and is used to indicate a range of data buffer sizes for the terminal. C1 may be a particular exact value or may be a range interval.

Optionally, the first setting information further includes priority information, and the priority corresponding to the data is the first priority.

Specifically, the priority information includes the first priority threshold value, and the fact that the first priority corresponds to the priority information means that the first priority is equal to or higher than the first priority threshold value. Including
The priority information includes a second priority threshold, and the fact that the first priority corresponds to the priority information includes that the first priority is equal to or less than the second priority threshold.
The priority information includes the first listed priority value, and the fact that the first priority corresponds to the priority information includes that the first priority is equal to the first listed priority value. , The enumerated values can be a set of discrete values, identifiers, or indexes, and if the first priority is equal to the first enumerated priority, the first priority is first. It means that it is equal to any of the listed priority values, for example, the first priority is priority 1 and the first listed priority value is {priority 1, priority. 5, Priority 6}, the first priority corresponds to the first listed priority value, or the priority information includes the first priority range and the first priority has priority. Corresponding to degree information includes that the first priority is within the first priority range.

Whether or not the first priority range includes the boundary value of the first priority range is not limited in this application, for example, (A1, B1), (A1, B1], [A1, B1). , And a plurality of possible combinations such as [A1, B1], where "(" indicates that the end value is not included and "]" includes the end value. Point to that.

In this application, priority information may not be limited to identifiers, indexes, or other information used to point to or point to priority information. It is used as an example that the priority information is the first priority threshold value. The first priority threshold may be pointed to by using an identifier, an index, or the first priority threshold itself.

The fact that the first reliability corresponds to the reliability information includes that the first reliability corresponds to the reliability information and the first priority corresponds to the priority information. Specifically, the first data field in the side link BSR is set as the first identifier only when the data to be sent by the terminal satisfies the constraint conditions of the reliability information and the priority information. The terminal transmits a BSR including the first identifier to the network device, and notifies the network device that the terminal has data whose reliability corresponds to the reliability information and whose priority corresponds to the priority information. .. Thus, the network device knows the data reliability and data priority of the side link data of the terminal.

Optionally, the terminal may instead set a second data field in the BSR as the terminal's data buffer size so that the base station can get more information about the sidelink data. Optionally, the data buffer size of the terminal is the data size of the side link data that is that of the terminal and satisfies both the reliability information and the priority information.

For example, the setting information is the correspondence between the LCG ID and the reliability information {reliability identifier 1}, {reliability identifier 1}, {reliability identifier 2}, {reliability identifier 3, reliability identifier 4}. including.

In addition, the setting information further includes {priority identifier 1}, {priority identifier 2}, {priority identifier 3}, and {priority identifier 4}.

The terminal can acquire the following correspondences based on the setting information.

In another example, the side link data of the terminal is data 1 and data 2, the data 1 corresponds to the priority identifier 1, the reliability identifier 1, the destination address 1, and the data size B1, and the data 2 is. It corresponds to the priority identifier 4, the reliability identifier 3, the destination address 2, and the data size B2. If sufficient uplink resources are present, the content of the sidelink BSR set by the terminal is as follows: {destination address 1, LCG ID1, C1} and {destination address 2, LCG ID4, C2}.

C1 represents an identifier or index corresponding to the data size B1, and C2 represents an identifier or index corresponding to the data size B2.

It should be noted that transmitting the BSR needs to occupy a specific uplink resource. When the uplink resources are inadequate, the terminal may send only part of the BSR to the base station. That is, the BSR contains only one LCG ID and the relevant information corresponding to the LCG ID. For example, the BSR may include only {destination address 1, LCG ID 1, C1}.

When multiple LCG IDs are present, different LCG IDs are prioritized during the BSR reporting. The LCG IDs may be reported in order according to the sequence number of the LCG ID, or may be reported in descending order of reliability.

Optionally, the setting information further includes priority information corresponding to the second identifier, and the priority corresponding to the data is the first priority. The second identifier may be the same as or different from the first identifier. It can be understood that the correspondence between the second identifier and the first priority may be explicit or implicit. Further, the second identifier may be the same as or different from the first identifier.

Optionally, the second identifier can be a second logical channel group identifier and / or a second destination address identifier.

Specifically, the priority information includes a third priority threshold value, and the fact that the first priority corresponds to the priority information means that the first priority is equal to or higher than the third priority threshold value. Including
The priority information includes a fourth priority threshold, and the fact that the first priority corresponds to the priority information includes that the first priority is equal to or less than the fourth priority threshold.
The priority information includes a second enumerated priority value, and the fact that the first priority corresponds to the priority information includes that the first priority is equal to the second enumerated priority value. , The enumerated values can be a set of discrete values, identifiers, or indexes, the first priority equal to the second enumerated priority means that the first priority is the second. It means that it is equal to any of the listed priority values, for example, the first priority is priority 1 and the second listed priority value is {priority 1, priority. 5, Priority 6}, the first priority is equal to the second listed priority value, or the priority information includes the second priority range and the first priority is the priority. Belonging to information includes that the first priority is within the second priority range.

Whether or not the second priority range includes the boundary value of the second priority range is not limited in this application, for example, (A1, B1), (A1, B1], [A1, B1). , And a plurality of possible combinations such as [A1, B1], where "(" indicates that the end value is not included and "]" includes the end value. Point to that.

In this application, priority information may not be limited to identifiers, indexes, or other information used to point to or point to priority information. It is used as an example that the priority information is the second priority threshold value. The second priority threshold may be pointed to by using an identifier, an index, or the second priority threshold itself.

In this case, the fact that the first reliability corresponds to the reliability information includes that the first reliability corresponds to the reliability information and the first priority corresponds to the priority information. The terminal sets the first data field in the Buffer Status Reporting (BSR) as the first identifier only when the terminal data meets the constraints of both reliability and priority information. The second data field in the BSR is set as the second identifier. The terminal transmits the BSR to the network device, and notifies the network device that the terminal has data whose reliability corresponds to the first reliability information and whose priority belongs to the priority information. Thus, the base station knows the data reliability and data priority of the side link data of the terminal.

Optionally, setting the first data field in the BSR as the first identifier sets the first N1 bit of the first data field in the BSR as the first identifier and of the first data field. It involves setting the last N2 bit as a second identifier, where N1 and N2 are positive integers and may be the same or different. Thus, the base station knows the data reliability and data priority of the side link data of the terminal.

Optionally, setting the first data field in the BSR as the first identifier sets the first M1 bit of the first data field in the BSR as the first identifier and of the first data field. It involves setting the last M2 bit as a second identifier, where M1 and M2 are positive integers and may be the same or different. Thus, the base station knows the data reliability and data priority of the side link data of the terminal.

Optionally, the terminal may instead set a second data field in the BSR as the terminal's data buffer size so that the base station can get more information about the sidelink data. Optionally, the data buffer size of the terminal is the data size of the side link data that is that of the terminal and satisfies both the reliability information and the priority information.

For example, the setting information includes a correspondence between the LCG ID and the reliability information {reliability identifier 1}, {reliability identifier 2}, {reliability identifier 3}, and {reliability identifier 4}.

The setting information further includes a correspondence between the LCG ID and the priority information {priority identifier 1}, {priority identifier 2}, {priority identifier 3}, and {priority identifier 4}.

The terminal can acquire the following correspondence by acquiring the setting information.

For example, in Table 6, any item in the first column can represent a first identifier, the corresponding second column represents priority information, and any item in the third column has a second identifier. And the corresponding fourth column can represent reliability information. The side link data of the terminal are data 1 and data 2, data 1 corresponds to priority identifier 1, reliability identifier 2, destination address 1, and data size B1, and data 2 corresponds to priority identifier 4, It corresponds to the reliability identifier 3, the destination address 2, and the data size B2. If the terminal has sufficient uplink resources available, the sidelink BSR content will be {destination address 1, LCG ID1, LCG ID2, C1}, {destination address 2, LCG ID4, LCG ID3, C2}. Can be shown as follows, where C1 is the identifier or index corresponding to the data size B1 and C2 is the identifier or index corresponding to the data size B2.

Certainly, as can be understood, the first and second identifiers may be included in one data field, eg, the first data field. For example, it can be assumed that the first data field format corresponding to data 1 is shown in FIG. 6, where the first N1 bit is used to point to LCG ID1 and the last N2 bit is LCG ID2. May be used to point to, and vice versa. N1 and N2 may be the same, both being 4.

FIG. 7 is a schematic configuration diagram of an embodiment of a data transmission device according to this application. This device may be a terminal in the above-described embodiment, for example, a first terminal, or may be arranged on the terminal so as to execute the data transmission method corresponding to FIG.

As shown in FIG. 7, the data transmission device includes a processor 701 and a transceiver circuit 702.

Processor 701 uses a transceiver circuit to obtain information used to point to a first condition, to obtain data to be transmitted, and when the first condition is met, on the sidelink, a second. The transmission target data on the first logical channel is transmitted by using one carrier frequency, and the transmission target data on the second logical channel is transmitted by using the second carrier frequency. It is configured as follows.

The information used to indicate the first condition includes one or more of channel congestion information and reliability information.

The first condition includes one or more of a congestion condition and a reliability condition.

Optionally, the first condition can be an activation condition.

The information used to point to the first condition can be carried by RRC signaling transmitted to the terminal by the network device, which RRC signaling can be a SIB message or a dedicated RRC signaling. The processor receives RRC signaling by using a transceiver circuit to obtain the information used to point to the first condition.

Alternatively, the information used to point to the first condition may be carried in a data packet transmitted by the network device to the terminal device and may be included, for example, in the MAC CE. The processor receives a data packet by using a transceiver circuit to obtain information used to point to a first condition.

Alternatively, the information used to point to the first condition is carried on the PDCCH, the processor receives the PDCCH by using a transceiver circuit, the PDCCH contains a DCI, and the DCI contains the first condition. Carrying the information used to point.

Alternatively, the information used to point to the first condition is included in the preset information, and the processor obtains the information used to point to the first condition by using the transceiver circuit.

Optionally, in one possible implementation, the channel congestion information includes a first channel congestion threshold, and the congestion condition includes that the channel congestion degree for the third carrier frequency is greater than or equal to the first channel congestion threshold. ,
The channel congestion information includes a second channel congestion threshold, the congestion condition includes that the channel congestion degree for the third carrier frequency is less than or equal to the second channel congestion threshold, or the channel congestion information includes the first channel congestion information. Is the channel congestion range of, and the congestion condition includes that the channel congestion degree for the third carrier frequency of the terminal is within the first channel congestion range.
The third carrier frequency is one of the carrier frequencies used for sidelink communication set or preset by the network device.

Optionally, in one other possible implementation, the reliability information includes a first reliability threshold and the reliability condition comprises that the reliability of the data to be transmitted is greater than or equal to the first reliability threshold.
The reliability information includes the first listed reliability value, the reliability condition includes that the reliability of the data to be transmitted is equal to the first listed reliability value, or the reliability information is the first. The reliability condition includes the reliability range of the above, and the reliability condition includes that the reliability of the data to be transmitted is within the first reliability range.

Optionally, in one possible implementation of this embodiment, the processor 701 is further configured to use a transceiver circuit to obtain information used to point to a carrier frequency set, the carrier frequency set being the first. Corresponding to the data attribute of, the carrier frequency set includes the first carrier frequency and the second carrier frequency, and the data to be transmitted has the data attribute.

Data attributes include at least one of priority, reliability, delay, destination address, and service type. The first data attribute may further include another feature, which is not particularly limited in this embodiment.

The method of retrieving the information used to point to the carrier frequency set is similar to the method of retrieving the information used to point to the first condition, the details of which are not described again here.

Optionally, in yet another possible implementation of this embodiment, the processor 701 is further configured to acquire the data attributes of each logical channel by using a transceiver circuit.

The processor is further configured to detect the data attributes of each logical channel and determine the first and second logical channels.

Optionally, in yet another possible implementation of this embodiment, the processor 701 further uses a transceiver circuit to obtain and preset a preset correspondence between logical channels used for duplicate data transmission. It is configured to determine a first logical channel and a second logical channel when it is detected that the correspondence is satisfied.

As can be understood, "detection" can also be described as determining, determining, or the like.

Optionally, in yet another possible implementation of this embodiment, the processor 701 further uses a first carrier frequency on the side link when the second condition is met to provide a first logic channel. It is configured to stop transmitting the transmission target data on the second logical channel by transmitting the transmission target data above and using the second carrier frequency.

Further, the information used to point to the second condition includes any one of a third channel congestion threshold, a fourth channel congestion threshold, and a second channel congestion range.

The second condition is that the channel congestion degree for the fourth carrier frequency is equal to or higher than the third channel congestion threshold value.
It includes the fact that the channel congestion degree for the fourth carrier frequency is equal to or less than the fourth channel congestion threshold value, or the channel congestion degree for the fourth carrier frequency is within the second channel congestion range.

The fourth carrier frequency may be the same as or different from the third carrier frequency.

In addition, the device provided in this embodiment further generates a sidelink BSR containing the identification information and reports the BSR to the network device so as to implement the data transmission method shown in FIG. It is composed. The details are as follows.

The transceiver circuit 702 is configured to acquire configuration information and data, which may include reliability information corresponding to the first identifier, or may further include a first identifier.

When the processor 701 detects that the first reliability corresponds to the reliability information, it sets the first data field in the sidelink buffer status report BSR as the first identifier and sets the transceiver circuit 702 as the first identifier. By using it, the BSR is configured to be transmitted to a network device.

The first identifier includes a first logical channel group identifier, a first destination address identifier, or a first logical channel group identifier and a first destination address identifier.

Optionally, in one possible implementation of this embodiment, the reliability information includes a second reliability threshold, and the first reliability corresponds to the reliability information, the first reliability is the second. Including being above the reliability threshold of
The reliability information includes a third reliability threshold, and the fact that the first reliability corresponds to the reliability information includes that the first reliability is equal to or less than the third reliability threshold.
The reliability information has a second enumerated confidence value, and the fact that the first reliability corresponds to the reliability information means that the first reliability is equal to the second enumerated reliability value. The inclusion or reliability information includes a second reliability range, and the fact that the first reliability corresponds to the reliability information includes that the first reliability is within the second reliability range. ..

Optionally, in one possible implementation of this embodiment, the configuration information further includes priority information, and the priority corresponding to the data is the first priority.

Specifically, the processor is the first in the sidelink buffer status report BSR when it is detected that the first reliability corresponds to the reliability information and the first priority corresponds to the priority information. The data field is set as the first identifier and is configured to transmit the BSR to the network device by using the transceiver circuit 702.

Optionally, in yet another possible implementation of this embodiment, the priority information includes a first priority threshold, and it is the first priority that the first priority corresponds to the priority information. Including that the degree is equal to or higher than the first priority threshold
The priority information includes a second priority threshold, and the fact that the first priority corresponds to the priority information includes that the first priority is equal to or less than the second priority threshold.
The priority information includes the first listed priority value, and the fact that the first priority corresponds to the priority information includes that the first priority is equal to the first listed priority value. , Or the priority information includes a first priority range, and the fact that the first priority corresponds to the priority information includes that the first priority is within the first priority range.

In a particular implementation, this application further provides a terminal. As shown in FIG. 8, the terminal is configured to execute the data transmission method according to the above-described embodiment. The terminal may include a processor 801 and a transceiver 802, and a memory 803. The terminal may further include more or fewer components, may combine some components, or may have different component configurations. This is not limited in this application.

Transceiver 802 includes a transceiver circuit. Transceiver circuits are receiver and transmit units configured to perform communication and transmission between terminals and between terminals and network devices, such as transmitting and receiving data, signaling, and request messages. May include.

Further, the transceiver 802 may include, for example, wireless network communication, bluetooth communication, infrared communication, and / or, for example, wideband code division multiple access (WCDMA) and / or high speed downlink packet access. , HSDPA), wireless local area network (WLAN) modules, Bluetooth modules, and base band modules, and radio frequencies (Wireless local area network (WLAN) modules), and radio frequency (base band) modules, which correspond to communication modules for performing communication in cellular communication systems such as HSDPA. It may include communication modules such as radio frequency (RF) circuits.

The processor 801 is the control center of the terminal and is connected to all parts of the entire terminal device by using various interfaces and lines to run or execute software programs and / or modules stored in the memory and the memory 803. Calls the data stored in the terminal to perform various functions of the terminal and / or process the data.

Further, the processor 801 can include an integrated circuit (IC), for example may include a single packaged IC, or a plurality of connected packaged ICs having the same or different functions. May include. For example, the processor 801 may include only a central processing unit (CPU), or a GPU, a digital signal processor (DSP), and a control chip (eg, a base) in a transceiver module. It may be a combination of band chips). In various implementations of this application, the CPU may be a single computing core or may include multiple computing cores.

The memory 803 can include, for example, a volatile memory such as a random access memory (RAM), or, for example, a flash memory, a hard disk drive (HDD), or It can include non-volatile memory such as solid-state drive (SSD). The memory may instead include a combination of the types of memory described above. The memory can store a program or code, and the processor 801 of the terminal can implement the function of the network device by executing the program or the code.

In the above-described embodiment, all the functions of the transceiver circuit 702 shown in FIG. 7 can be implemented by the transceiver 802 of the terminal, or can be implemented by the processor 801 that controls the transceiver 802. The functions implemented by the processor or processing unit shown in FIG. 7 may be implemented by the processor 801.

The memory 803 is used, for example, to indicate the information used to indicate the first condition, the information used to indicate the carrier frequency set, the channel congestion information, the reliability information, and the second condition. It is configured to store various information from network devices such as information. In addition, this information can be carried by RRC signaling. In addition, the memory is further configured to store a first carrier frequency set, a second carrier frequency set, data to be transmitted in the PDCP layer, various congestion conditions, various reliability conditions, and the like. Will be done.

In a particular implementation, this application further provides a computer storage medium. The computer storage medium can store the program, and when the program is executed, some or all of the steps in the embodiment of the data transmission method provided in this application may be performed. The storage medium may be a magnetic disk, an optical disk, a ROM, a RAM, or the like.

Corresponding to the terminal embodiment described above, this application further provides a network device configured to implement a data transmission method corresponding to the behavior of the terminal. Specifically, the network device includes a processor, a transceiver, and a memory, or the configuration of the network device is the same as that of the terminal. The details are as follows.

The network device generates information pointing to the first condition, and the information about the first condition can include or activate the activation condition used to activate duplicate transmission in the PDCP layer. It can contain information such as required parameters used to indicate the condition.

The network device transmits information about the first condition.

Optionally, the information used to point to the first condition includes a first channel congestion threshold, a second channel congestion threshold, or a first channel congestion range. The first condition includes a congestion condition. Further, the congestion condition is that the channel congestion degree for the third carrier frequency of the terminal is equal to or higher than the first channel congestion threshold value, and the channel congestion degree for the third carrier frequency of the terminal is equal to or lower than the second channel congestion threshold value. Or that the channel congestion degree for the third carrier frequency of the terminal is within the first channel congestion range.

Optionally, the information used to point to the first condition includes a first confidence threshold, a first enumerated confidence value, or a first confidence range, the first condition being confidence. Including sexual conditions. Further, the reliability condition includes that the reliability of the data to be transmitted is equal to or higher than the first reliability threshold, and the reliability condition is that the reliability of the data to be transmitted is equal to the first listed reliability value. However, the reliability condition includes that the reliability of the data to be transmitted is within the first reliability range.

The network device generates information pointing to the second condition and transmits the information pointing to the second condition.

The information used to point to the second condition includes any one of a third channel congestion threshold, a fourth channel congestion threshold, and a second channel congestion range. The second condition is that the channel congestion for the fourth carrier frequency is equal to or higher than the third channel congestion threshold, and that the channel congestion for the fourth carrier frequency is equal to or lower than the fourth channel congestion threshold. Alternatively, it includes that the channel congestion degree for the fourth carrier frequency is within the second channel congestion range.

Optionally, the network device also sends RRC signaling, which contains information used to point to a third carrier frequency.

Optionally, this RRC signaling contains information used to point to a first carrier frequency set and a second carrier frequency set.

Optionally, this RRC signaling contains information used to point to a third carrier frequency set.

Optionally, this RRC signaling contains information used to point to a fourth carrier frequency set, the fourth carrier frequency set corresponds to the first data attribute, and the fourth carrier frequency set is the second. Includes one carrier frequency and a second carrier frequency. Data attributes include one or more of priority, reliability, delay, destination address, and service type.

Further, in this embodiment, the network device is further configured to acquire the side link status of the terminal and send configuration information to the terminal in order to better schedule resources for the terminal. Network equipment
The network device transmits the setting information to the terminal, the setting information includes the reliability information corresponding to the first identifier, and the setting information corresponds to the reliability information of the data of the terminal. Used to configure the terminal to set the first data field in the Sidelink Buffer Status Report BSR as the first identifier, and
Receive the side link BSR from the terminal by the network device,
It is configured as follows .

Optionally, the configuration information also includes priority information,
The setting information is used to set the terminal to send a sidelink BSR when the reliability of the data of the terminal corresponds to the reliability information and the priority of the data corresponds to the priority information. The first data field in the link BSR is the first identifier.

Optionally, the first identifier includes a first logical channel group identifier, a first destination address identifier, or a first logical channel group identifier and a first destination address identifier.

In a particular implementation, the processor of the network appliance implements the aforementioned data transmission method by reading the instructions in memory. A memory is coupled to the processor, which includes a storage medium such as a magnetic disk, optical disk, ROM, or RAM.

The terminals of this application are used in sidelink technology scenarios, ie, are applicable for device to device (D2D) data transmission. The terminal may be a transmitting device at one end or a receiving device at the other end.

In addition, the application further provides a communication system used to transmit duplicate data packets over a sidelink. The system includes at least two terminals, each terminal of which can be the data transmission apparatus shown in FIG. 7 to implement the data transmission method of embodiment 1 of the present application, or shown in FIG. Can include terminal configurations.

Specifically, the data transmission method comprises the following steps, i.e.

The first terminal determines at least one first carrier frequency and at least one second carrier frequency, the first carrier frequency and the second carrier frequency are different, and
On the side link by the first terminal, the data on the first logical channel and the data on the second logical channel are transferred to the at least one first carrier frequency and the at least one second carrier, respectively. By using a frequency, it is transmitted to a second terminal, both the first logical channel and the second logical channel contain the first data, the first data being from the same PDCP entity.
Including steps.

Optionally, determining at least one first carrier frequency and at least one second carrier frequency by the first terminal autonomously by the first terminal at least one first carrier frequency and at least one. Includes determining one second carrier frequency, or determining at least one first carrier frequency and at least one second carrier frequency through presetting by a network device.

Optionally, this method further comprises acquiring a correspondence between the carrier frequency set and the identifier by means of a first terminal, where the identifier is of priority, destination address, reliability, delay, and service type. Includes at least one of them.

Determining at least one first carrier frequency and at least one second carrier frequency by the first terminal further corresponds to the first identifier corresponding to the first data by the first terminal. The at least one first carrier frequency and the at least one second carrier frequency include determining at least one first carrier frequency and at least one second carrier frequency based on the above. Belongs to a carrier frequency set.

Further, the first identifier corresponding to the first data is the priority corresponding to the first data, the destination address corresponding to the first data, the reliability corresponding to the first data, and the first data. Includes at least one of the corresponding delay, the service type corresponding to the first data, and the like.

Optionally, the data on the first logical channel and the data on the second logical channel on the side link by the first terminal are switched to the at least one first carrier frequency and the at least one second carrier, respectively. The method further comprises determining whether the first condition is met by the first terminal prior to transmission to the second terminal by using the frequency, if the first condition is met. , Includes delivering the first data separately to the first logical channel and the second logical channel.

Optionally, the method further comprises acquiring first channel congestion information by the first terminal.

When the first channel congestion information is the first channel congestion threshold, the first condition includes that the channel congestion degree for the third carrier frequency is equal to or higher than the first channel congestion threshold.
When the first channel congestion information is the second channel congestion threshold, the first condition includes that the channel congestion degree for the third carrier frequency is equal to or less than the second channel congestion threshold, or the first. When the channel congestion information of is in the first channel congestion range, the first condition includes that the channel congestion degree for the third carrier frequency is within the first channel congestion range.

Optionally, this method further comprises acquiring reliability information by a first terminal.

When the reliability information includes the first reliability threshold, the first condition includes that the data reliability information corresponding to the first data is equal to or higher than the first reliability threshold.
When the reliability information includes a second reliability threshold, the first condition includes that the data reliability information corresponding to the first data is equal to the second reliability threshold, and the second reliability threshold. Is one or more enumerated confidence values, or if the reliability information includes a first confidence range, the first condition is that the data reliability information corresponding to the first data is the first trust. Includes being within the sexual range.

Optionally, this method further includes:
Specifically, when the second condition is satisfied, it is determined that the first terminal device stops delivering the same first data to the first logical channel and the second logical channel. include.

Optionally, the method further comprises acquiring a second channel congestion information by the first terminal.

If the second channel congestion information includes a third channel congestion threshold and a fourth channel congestion threshold, the second condition is the channel for at least one first carrier frequency corresponding to the first logical channel. Including that the degree of congestion is equal to or higher than the third channel congestion threshold and the degree of channel congestion for at least one second carrier frequency corresponding to the second logical channel is equal to or higher than the fourth channel congestion threshold. Alternatively, if the second channel congestion information includes a fifth channel congestion threshold and a sixth channel congestion threshold, the second condition is for at least one first carrier frequency corresponding to the first logical channel. Includes that the channel congestion is less than or equal to the fifth channel congestion threshold and the channel congestion for at least one second carrier frequency corresponding to the second logical channel is less than or equal to the sixth channel congestion threshold. ..

The channel congestion degree for the at least one first carrier frequency corresponding to the first logical channel is the maximum value of the channel congestion degree corresponding to the at least one first carrier frequency, or the at least one first carrier frequency. It is the minimum value of the channel congestion corresponding to the carrier frequency of.

The channel congestion degree for the at least one second carrier frequency corresponding to the second logical channel is the maximum value of the channel congestion degree corresponding to the at least one second carrier frequency, or the at least one second carrier frequency. It is the minimum value of the channel congestion corresponding to the carrier frequency of.

In this application, the first channel congestion threshold, the second channel congestion threshold, the third channel congestion threshold, the fourth channel congestion threshold, the fifth channel congestion threshold, and the sixth channel congestion threshold are the same. The first channel congestion range and the second channel congestion range may be the same or different, and the first reliability threshold and the second reliability may be different. The sex thresholds may be the same or different. These are not limited in this application.

Optionally, this method further comprises determining at least one first carrier frequency and at least one second carrier frequency by the first terminal.
The MAC layer of the terminal comprises determining the first and second logical channels used for duplicate transmission.

Optionally, determining the first and second logical channels by the MAC layer of the terminal is specifically:
The MAC layer includes determining a first logical channel and a second logical channel based on the identification information of the logical channel.
The identification information may include at least one of priority, reliability, delay, destination address, and service type.

Alternatively, if there is a pairing relationship between the first logical channel and the second logical channel, the MAC layer will use the first logical channel and the second logical channel based on the logical channel having the pairing relationship. May be determined.

For a detailed description of the various implementations of this method, see the description of the method in the aforementioned embodiments. Details will not be explained here again.

As will be clearly understood by those skilled in the art, the techniques in embodiments of this application may be implemented by software in combination with the required general hardware platform. Based on such understanding, the technical solutions in the embodiments of this application may be implemented in the form of software products, either in essence or in part that contributes to the prior art. Computer software products can be stored in storage media such as, for example, ROM / RAM, magnetic disks, optical disks, or the like, and computer devices (personal computers, servers, network devices, or the like). May include some instructions to make it possible to carry out any part of the method or embodiment described in the embodiments of this application.

See each other for the same or similar parts of the embodiments in this specification. In particular, the aforementioned embodiments in this application are essentially similar to the method embodiments and are therefore briefly described. For the relevant parts, refer to the description in the method embodiment.

The aforementioned implementation of this application is not intended to limit the scope of protection of this application.

Claims (12)

A data transmission method performed by a terminal
Acquire the setting information having the reliability information corresponding to the first identifier,
The data is acquired, and the reliability of the data is the first reliability.
When the first reliability corresponds to the reliability information, a sidelink buffer status report ( BSR ) is transmitted to the network device, and the sidelink BSR has the first identifier.
Have that
The reliability information has a second listed reliability value, and the fact that the first reliability corresponds to the reliability information means that the first reliability corresponds to the second listed reliability. Have equal to any one of the values,
Method. The setting information further has priority information, the priority corresponding to the data is the first priority, and the side link BSR is networked when the first reliability corresponds to the reliability information. The transmission to the device is
When the first reliability corresponds to the reliability information and the first priority corresponds to the priority information, the side link BSR is transmitted to the network device.
Have that
The priority information has a first listed priority value, and the fact that the first priority corresponds to the priority information means that the first priority corresponds to the first listed priority. Have equal to any one of the values,
The method according to claim 1 . The first identifier is
First logical channel group identifier,
First destination address identifier, or first logical channel group identifier and first destination address identifier,
The method according to claim 1 or 2 . A data transmission method performed by a network device ,
The setting information having the reliability information corresponding to the first identifier is transmitted to the terminal, and the setting information is a side link received from the terminal when the reliability of the data of the terminal corresponds to the reliability information. Used to set that the buffer status report ( BSR ) has the first identifier, said.
Receiving the sidelink BSR from the terminal,
Have that
The reliability information has a second enumerated confidence value, and the fact that the reliability of the data corresponds to the reliability information means that the reliability of the data corresponds to the second enumerated reliability. Have equal to any one of the values,
Method. The setting information further has priority information.
The setting information is such that the side link BSR received from the terminal when the reliability of the data of the terminal corresponds to the reliability information and the priority of the data corresponds to the priority information. Used to set to have a first identifier ,
The priority information has a first listed priority value, and the fact that the priority of the data corresponds to the priority information means that the priority of the data corresponds to the first listed priority. Have equal to any one of the values,
The method according to claim 4 . The first identifier is
First logical channel group identifier,
First destination address identifier, or first logical channel group identifier and first destination address identifier,
The method according to claim 4 or 5 . A data transmission device with a processor
The processor is configured to be coupled to memory, read the instructions in the memory, and execute the method according to any one of claims 1 to 3 in accordance with the instructions.
Device. The device according to claim 7 , further comprising the memory. A data transmission device with a processor
The processor is configured to be coupled to memory, read the instructions in the memory, and perform the method of any one of claims 4-6 in accordance with the instructions.
Device. The device according to claim 9, further comprising the memory. A computer-readable storage medium configured to store a program, wherein the program includes instructions for performing the method according to any one of claims 1 to 3 . .. A computer-readable storage medium configured to store a program, wherein the program comprises instructions for performing the method of any one of claims 4-6. ..

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